CN110925020A - Multi-parameter monitoring device and method for rock burst in coal mine main roadway area - Google Patents
Multi-parameter monitoring device and method for rock burst in coal mine main roadway area Download PDFInfo
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- CN110925020A CN110925020A CN201911233042.9A CN201911233042A CN110925020A CN 110925020 A CN110925020 A CN 110925020A CN 201911233042 A CN201911233042 A CN 201911233042A CN 110925020 A CN110925020 A CN 110925020A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
Abstract
The invention discloses a coal mine main roadway area rock burst multi-parameter monitoring device and a method. One end of the drilling stress monitoring device is arranged in a stress monitoring drill hole on one side of the roadway, the other end of the drilling stress monitoring device is fixed on the side part of the roadway, and the two ends of the drilling stress monitoring device are connected through a liquid guide pipe. One end of the drilling hole deformation monitoring device is arranged in a deformation monitoring drilling hole of one side of the roadway, the other end of the drilling hole deformation monitoring device is fixed at the side part of the roadway, and the two ends of the drilling hole deformation monitoring device are connected through a liquid guide pipe. The drilling stress and deformation monitoring device monitors drilling stress and deformation signals in real time and transmits the drilling stress and deformation signals to a nearby monitoring substation through a communication cable; each monitoring substation transmits monitoring signals to a monitoring master station through optical fibers, and the monitoring master station transmits all the monitoring signals to a ground terminal through a ring network. The method has the characteristics of flexibility, reliability, good monitoring effect, low cost and the like, and can be widely applied to prediction and early warning of the rock burst in the large roadway area of the coal mine.
Description
Technical Field
The invention belongs to the technical field of coal mine safety monitoring, and particularly relates to a coal mine roadway area rock burst multi-parameter monitoring device and method.
Background
Rock burst is a serious dynamic disaster faced by deep coal mining, which is easy to cause casualties of people and damages to roadways and equipment; the rock burst prevention and control relates to multiple links such as rock burst classification, impact risk evaluation, pressure relief and danger relief, impact risk monitoring, danger relief effect inspection, impact danger area support, material and personnel management and the like; wherein, impact risk monitoring is a key link for preventing and controlling the occurrence of rock burst disasters.
In order to monitor impact dangerousness, a slight shock monitoring method is mainly adopted for carrying out regional monitoring on a rock burst mine, and a stress monitoring method, a drilling cutting method, an electromagnetic radiation method and the like are adopted for carrying out local monitoring; the microseism monitoring method can carry out remote, real-time and dynamic monitoring on microseism signals, can determine the time, energy and position of the occurrence of a microseism event, and an analyst can judge the impact risk by analyzing the distribution characteristics and the change rule of the microseism event; the stress monitoring method is characterized in that a stress sensor is arranged in a coal seam drill hole to monitor the change of the coal seam stress in real time, and then impact danger is judged according to the change of the coal seam stress; the drilling cutting method is to judge impact danger according to the coal dust amount and the power effect of drilling per meter recorded in the drilling process, and the principle is that the coal dust amount and the power effect discharged during drilling have a certain corresponding relation with the stress state of a coal bed; the electromagnetic radiation method is to determine the stress change of the coal seam according to the electromagnetic radiation intensity change of the coal seam so as to judge the impact risk; it can be seen that the drilling cutting method and the electromagnetic radiation method which are commonly used for monitoring the impact risk belong to indirect stress monitoring methods; however, what monitoring method is selected for a certain area depends on the type of rock burst that may occur in the area; according to a force source or physical quantity for controlling rock burst, the rock burst can be divided into a dynamic load control type, a stress control type and a strain control type; wherein, the microseism monitoring method is suitable for the dynamic load control type rock burst danger monitoring; the stress monitoring method, the drilling cutting method and the electromagnetic radiation method are suitable for monitoring the dangerousness of the stress control type rock burst; the danger monitoring of the strain control type rock burst needs a drilling deformation monitoring method.
The coal mine main roadway area is generally far away from a goaf, dynamic loads generated by roof breakage, fault activation and the like can not be generally transmitted to the main roadway area, and dynamic load control type rock burst is not easy to occur; however, stress control type rock burst and strain control type rock burst are easy to occur in a coal mine main roadway area; therefore, the conventional stress monitoring method, drilling cutting method, electromagnetic radiation method and micro-seismic monitoring method cannot effectively monitor the rock burst in the main roadway area.
Disclosure of Invention
In order to solve the technical defects of incompleteness, inaccuracy and the like in the method, the invention belongs to coal mine safety monitoring and early warning equipment, and particularly relates to a coal mine roadway area rock burst multi-parameter monitoring device and a method;
in order to achieve the purpose, the invention adopts the following technical scheme: the monitoring device comprises a drilling stress monitoring device, a drilling deformation monitoring device, a plurality of monitoring substations, a monitoring master station and a ground terminal; one end of the drilling stress monitoring device is arranged in a stress monitoring drilling hole on one side of the roadway, the other end of the drilling stress monitoring device is fixed on a top plate of the roadway, and the two ends of the drilling stress monitoring device are connected through a liquid guide pipe; one end of the drilling hole deformation monitoring device is arranged in a deformation monitoring drilling hole on one side of the roadway, the other end of the drilling hole deformation monitoring device is fixed on a roadway top plate, and the two ends of the drilling hole deformation monitoring device are connected through a liquid guide pipe; the drilling stress monitoring device monitors a drilling stress signal in real time and transmits the drilling stress signal to a nearby monitoring substation through a cable; the drilling hole deformation monitoring device monitors a drilling hole deformation signal in real time and transmits the drilling hole deformation signal to a nearby monitoring substation through a cable; each monitoring substation transmits monitoring signals to a monitoring master station through optical fibers; and the monitoring master station transmits all monitoring signals to the ground terminal through a ring network.
The drilling stress monitoring device comprises a drilling stress sensor with one end arranged in the stress monitoring drilling hole and a pressure transmitter with the other end fixed on the roadway side part; each pressure transmitter one end and three-way valve pass through threaded connection, the three-way valve with pass through between the drilling stress sensor catheter connection, the pressure transmitter other end pass through the cable with monitoring substation nearby is connected, each all set up one in the stress monitoring drilling stress sensor, the catheter with drilling stress sensor communicates with each other.
The drilling hole deformation monitoring device comprises a drilling hole deformation sensor, one end of the drilling hole deformation sensor is arranged in the deformation monitoring drilling hole; the other end of the drilling hole deformation monitoring device is fixed on the roadway side part and comprises a stainless steel measuring cylinder and a pressure transmitter, and the stainless steel measuring cylinder is used for accommodating liquid overflowing from the drilling hole deformation sensor; each all set up one in the drilling deformation sensor, each drilling deformation sensor all connects one stainless steel graduated flask, each stainless steel graduated flask all connects one pressure transmitter for receiving drilling deformation signal, each pressure transmitter one end is connected with the stainless steel graduated flask, the other end pass through the cable with monitoring substation nearby connects, each drilling deformation sensor and each stainless steel graduated flask in the middle of pass through liquid pipe connection.
The stress monitoring drill holes are formed in one side of the coal mine main roadway, the diameter of each drill hole is 42mm, the depth of each drill hole is 9m, and the distance between every two adjacent drill holes is 30-50 m.
The deformation monitoring drill holes are formed in one side of the coal mine roadway, the diameter of each drill hole is 150mm, the depth of each drill hole is 8m, and the distance between every two adjacent drill holes is 30-50 m.
The stress monitoring drill hole is connected with the deformation monitoring drill hole, the stress monitoring drill hole continues to be deeply dug for 1m on the basis of the deformation monitoring drill hole, and the central positions of the stress monitoring drill hole and the deformation monitoring drill hole are the same circle center.
The monitoring device is connected with the nearby monitoring substations through cables, and each monitoring substation is connected with the monitoring master station through optical fibers.
All the monitoring sub-stations and all the monitoring main stations are arranged underground.
The drilling stress sensor in the drilling stress monitoring device is placed at the deepest position of the stress monitoring drill hole, and the drilling deformation sensor in the drilling deformation monitoring device is placed at the middle position of the deformation monitoring drill hole.
The drilling stress sensor comprises an upper stainless steel sheet, a lower stainless steel sheet and an oil bag in the middle; the width of the drilling stress sensor is 0.036m, the length of the drilling stress sensor is 0.5m, the thickness of the upper stainless steel sheet and the lower stainless steel sheet is 0.03m, the length of the upper stainless steel sheet and the lower stainless steel sheet is 0.5m, and the width of the upper stainless steel sheet and the lower stainless steel sheet is 0.042 m.
The width of the drilling deformation sensor is 0.15m, and the length of the drilling deformation sensor is 2 m.
Among the drilling stress monitoring devices drilling stress sensor puts into behind the stress monitoring drilling, through the three-way valve to inject suitable liquid into drilling stress sensor, make its internal pressure reach 5MP, receive the influence of mining process and stratum motion, the surrounding rock stress concentrates gradually in the drilling and forces the rock mass to strike the tendency aggravation, and drilling stress sensor is at the monitoring process, two upper and lower stainless steel sheets receive drilling stress effect extrusion oil pocket, drilling stress sensor is under the extrusion, inside liquid gets into the catheter, produces pressure, pressure transmitter received signal, through the cable arrives signal transmission near the monitoring sub-station.
Drilling among the drilling deformation monitoring devices deformation sensor is put into behind the deformation monitoring drilling, fill liquid, the monitoring process drilling is owing to adopt the influence to take place to warp, the extrusion drilling deformation sensor, liquid in the drilling deformation sensor passes through the liquid pipe flows in the stainless steel graduated flask, through pressure transmitter receives drilling deformation signal, through the cable arrives signal transmission the monitoring substation nearby.
The stainless steel measuring cylinder is designed into a cylinder with openings at two ends, the diameter of the cylinder is 0.2m, and the height of the cylinder is 0.5m, and two ends of the stainless steel measuring cylinder are respectively connected with the liquid guide pipe and the pressure transmitter.
A multi-parameter monitoring method for rock burst in a coal mine main roadway area comprises the steps of drilling stress monitoring and drilling deformation monitoring,
wherein: borehole stress monitoring comprises:
step 1: determining a monitoring range and a large roadway area according to mine geological conditions and mine mining conditions, arranging measuring points at intervals of 30-50 m at two sides of the large roadway in a staggered manner, and excavating and establishing drill holes according to the arranged measuring points, wherein firstly, a drilling machine is used for excavating and establishing deformation monitoring drill holes, and the size of the deformation monitoring drill holes is as follows: the diameter of the drilled hole is 0.15m, and the depth of the drilled hole is 8 m; secondly, go deep into to dig on the basis of deformation monitoring drilling and establish stress monitoring drilling, its size of dimensions is: the diameter of the drilled hole is 0.15m, and the depth of the drilled hole is 8 m; the central positions of the two drill holes are the same circle center; the measuring points are arranged on the two sides of the main roadway to form a space structure, and the space position of the whole main roadway is monitored in an all-round manner;
step 2: installing a drilling stress sensor at the deepest position of a stress monitoring drill hole, opening a three-way valve connected with the drilling stress sensor to inject a proper amount of liquid into the drilling stress sensor, ensuring that the rated pressure in the drilling stress sensor reaches 5MP, and screwing down the three-way valve to enable the interior of the drilling stress sensor to be in a closed state;
connecting the drilling stress sensor with the pressure transmitter by using a liquid guide pipe, wherein one end of the liquid guide pipe is ensured to be communicated with the drilling stress sensor in the drilling stress monitoring device in the connection process, so that liquid in the drilling stress sensor flows into the liquid guide pipe, and the other end of the liquid guide pipe is connected with the pressure transmitter, but the liquid cannot enter the pressure transmitter and can only be contacted with the surface of the pressure transmitter to receive a pressure signal;
and 4, step 4: under the influence of terrain change and mining, drilling stress is gradually concentrated to force a rock mass to have an impact tendency, the drilling stress sensor is extruded by the upper stainless steel sheet and the lower stainless steel sheet under the action of the drilling stress in the monitoring process, internal liquid enters the liquid guide pipe under the extrusion action of the drilling stress sensor to generate pressure, one end of the pressure transmitter, which is connected with the liquid guide pipe, receives a pressure signal, converts the pressure signal into an electric signal, and transmits the signal to the nearby monitoring substation through a cable;
and 5: each monitoring substation is connected with a monitoring master station through optical fibers, all monitoring signals of the monitoring substations are transmitted to the monitoring master station, and the monitoring master station transmits the monitoring signals to a ground terminal through a ring network;
the monitoring of the deformation of the drill hole comprises the following steps:
step 1: digging deformation monitoring drill holes according to the distribution points;
step 2: a drilling hole deformation sensor is arranged in the middle of the deformation monitoring drilling hole, and liquid is filled into the drilling hole deformation sensor to ensure that the drilling hole deformation sensor reaches enough pressure intensity and the interior of the drilling hole deformation sensor is in a closed state;
and step 3: the drilling hole deformation sensor is connected with the stainless steel measuring cylinder by using the liquid guide pipe, one end of the liquid guide pipe is communicated with the drilling hole deformation sensor in the connecting process, and the other end of the liquid guide pipe is communicated with the stainless steel measuring cylinder, so that liquid in the drilling hole deformation sensor enters the stainless steel measuring cylinder through the liquid guide pipe, but the liquid cannot enter the pressure transmitter and only can be contacted with the surface of the pressure transmitter to receive a pressure intensity signal;
and 4, step 4: under the influence of terrain change and mining, the deformation of the roadway causes deformation of the deformation monitoring drill hole to extrude the drill hole deformation sensor, the internal liquid of the drill hole deformation sensor enters the stainless steel graduated cylinder through the liquid guide pipe under the extrusion action to generate pressure, one end of the pressure transmitter, which is connected with the stainless steel graduated cylinder, receives a pressure signal, converts the pressure signal into an electric signal, and transmits the signal to the nearby monitoring substation through a cable;
and 5: each monitoring substation is connected with a monitoring master station through optical fibers, all monitoring signals of the monitoring substations are transmitted to the monitoring master station, and the monitoring master station transmits the monitoring signals to a ground terminal through a ring network.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. according to the invention, the two sides of the main roadway are staggered with drilled holes, the interval between the drilled holes is 30-50 m, and the depth of the drilled hole reaches 8m, so that the multi-point monitoring of the rock burst in the main roadway area of the coal mine is realized; 2. according to the invention, as the drill hole stress sensor and the drill hole deformation sensor are arranged in each drill hole, the sensors convert received signals such as vibration waves and sound waves into electric signals, so that the real-time dynamic monitoring of the multiple parameters of the rock burst in the large roadway area of the coal mine is realized; 3. the invention adopts the cable to transmit the signal received by the sensor to the nearby monitoring substation, so that the signal transmission is timely and accurate; 4. according to the invention, the signals of all the monitoring substations are transmitted to the monitoring master station by adopting the optical fiber, and the signals of the monitoring master station are transmitted to the ground terminal through the ring network, so that the ground terminal can analyze the monitoring signals more accurately, scientifically and rapidly and evaluate the dangerousness and the harshness of the rock burst; therefore, the method can be widely applied to prediction and forecast of the rock burst in the large roadway area of the coal mine.
Drawings
FIG. 1 is a network topology diagram of a rock burst multi-parameter monitoring system;
FIG. 2 is a partially enlarged schematic view of a multiple parameter rock burst monitoring system.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
As shown in fig. 1, the invention provides a coal mine roadway area rock burst multi-parameter monitoring device, which comprises a drilling stress monitoring device 1, a drilling deformation monitoring device 2, a plurality of monitoring substations 3, a monitoring main station 4 and a ground terminal 5; one end of the drilling stress monitoring device 1 is arranged in a stress monitoring drilling 6 dug at one side of the roadway, the other end of the drilling stress monitoring device is fixed at the side part of the roadway, and the two ends of the drilling stress monitoring device are connected through a liquid guide pipe 7; one end of the drilling hole deformation monitoring device 2 is arranged in a deformation monitoring drilling hole 8 of one side of the roadway, the other end of the drilling hole deformation monitoring device is fixed at the side part of the roadway, and the two ends of the drilling hole deformation monitoring device are connected through a liquid guide pipe 7; the drilling stress monitoring device 1 monitors a drilling stress signal of a stress monitoring drill 6 in real time and transmits the signal to the nearby monitoring substation 3 through a cable 9; the drilling deformation monitoring device 2 monitors a deformation monitoring drilling 8 drilling deformation signal in real time and transmits the signal to the nearby monitoring substation 3 through a cable 9; each monitoring substation 3 transmits a monitoring signal to the monitoring master station 4 through an optical fiber 10; the monitoring central station 4 transmits all monitoring signals to the ground terminal 5 through the ring network 11.
The drilling stress monitoring device 1 comprises a drilling stress sensor 12 with one end arranged in the stress monitoring drilling 6 and a pressure transmitter 13 with the other end fixed on the roadway wall; each pressure transmitter 13 one end and three-way valve 14 pass through threaded connection, three-way valve 14 with pass through between the drilling stress sensor 12 catheter 7 is connected, pressure transmitter 13 other end passes through cable 9 with monitoring substation 3 nearby is connected, each all set up one in the stress monitoring drilling 6 drilling stress sensor 12, catheter 7 with drilling stress sensor 12 communicates with each other.
The drilling hole deformation monitoring device 2 comprises a drilling hole deformation sensor 15, one end of which is arranged in the deformation monitoring drilling hole 8; the other end of the drilling hole deformation monitoring device 2 is fixed on a roadway side part and comprises a stainless steel measuring cylinder 16 and a pressure transmitter 13, wherein the stainless steel measuring cylinder 16 is used for accommodating liquid overflowing from the drilling hole deformation sensor 15; each all set up one in the deformation monitoring drilling 8 drilling deformation sensor 15, each drilling deformation sensor 15 all connects one stainless steel graduated flask 16, each stainless steel graduated flask 16 all connects one pressure transmitter 13 for receive 8 deformation signals in deformation monitoring drilling, each pressure transmitter 13 one end is connected with stainless steel graduated flask 16, and the other end passes through cable 9 with monitoring substation 3 nearby is connected, each drilling deformation sensor 15 and each stainless steel graduated flask 16 in the middle of pass through catheter 7 connects.
In the above example, the stress monitoring drill holes 6 are arranged in one side of the coal mine main roadway, the diameter of each drill hole is 0.42m, the depth of each drill hole is 9m, and the distance between every two adjacent drill holes is 30-50 m.
In the above example, the deformation monitoring drill hole 8 is arranged in one side of the coal mine roadway, the diameter of the drill hole is 1.5m, the depth of the drill hole is 8m, and the distance between adjacent drill holes is 30-50 m.
In the above example, the stress monitoring borehole 6 is connected to the deformation monitoring borehole 8, and the stress monitoring borehole 6 is further dug on the basis of the deformation monitoring borehole 8, wherein the center positions of the stress monitoring borehole 6 and the deformation monitoring borehole 8 are the same center.
In the above example, the monitoring device is connected to the nearby monitoring substations 3 by cables 9, and each monitoring substation 3 is connected to the monitoring master station 4 by optical fibers 10.
In the above example, all monitoring substations 3 and all monitoring master stations 4 are disposed downhole.
In the above example, the borehole stress sensor 12 in the borehole stress monitoring device 1 is placed at the deepest position of the stress monitoring borehole 7, and the borehole deformation sensor 15 in the borehole deformation monitoring device 2 is placed at the middle position of the deformation monitoring borehole 8.
In the above example, the borehole stress sensor 12 has a width of 0.36m and a length of 0.5m, and the two stainless steel sheets 17 have a thickness of 0.3m, a length of 0.5m and a width of 0.42 m.
In the above example, the borehole deformation sensor 15 has a width of 1.5m and a length of 2 m.
A multi-parameter monitoring method for rock burst in a coal mine main roadway area comprises the steps of drilling stress monitoring and drilling deformation monitoring,
wherein: borehole stress monitoring comprises:
step 1: determining a monitoring range and a large roadway area according to mine geological conditions and mine mining conditions, arranging measuring points at intervals of 30-50 m at two sides of the large roadway in a staggered manner, and excavating and establishing drill holes according to the arranged measuring points, wherein firstly, a drilling machine is used for excavating and establishing a deformation monitoring drill hole 8, and the size of the deformation monitoring drill hole is as follows: the diameter of the drilled hole is 1.5m, and the depth of the drilled hole is 8 m; secondly, go deep into to dig on deformation monitoring drilling 8 and establish stress monitoring drilling 6, its size of a dimension is: the diameter of the drilled hole is 1.5m, and the depth of the drilled hole is 8 m; the central positions of the two drill holes are the same circle center; the measuring points are arranged on the two sides of the main roadway to form a space structure, and the space position of the whole main roadway is monitored in an all-round manner;
step 2: installing a drilling stress sensor 12 at the deepest position of a stress monitoring drill hole 6, opening a three-way valve 14 connected with the drilling stress sensor 12, injecting a proper amount of liquid into the drilling stress sensor 12, ensuring that the rated pressure in the drilling stress sensor 12 reaches 5MP, and screwing down the three-way valve 14 to enable the interior of the drilling stress sensor 12 to be in a closed state;
and 4, step 4: under the influence of terrain change and mining, the drilling stress is gradually concentrated to force the rock mass to have impact tendency, the drilling stress sensor 12 is extruded by the upper stainless steel sheet 17 and the lower stainless steel sheet 17 under the action of the drilling stress in the monitoring process of the drilling stress sensor 12, the internal liquid enters the liquid guide pipe 7 under the extrusion action of the drilling stress sensor 12 to generate pressure, the pressure transmitter 13 is connected with the liquid guide pipe 7, one end of the pressure transmitter 13 receives a pressure signal, the pressure transmitter 13 converts the pressure signal into an electric signal, and the signal is transmitted to the nearby monitoring substation 3 through the cable 9;
and 5: each monitoring substation 3 is connected with a monitoring master station 4 through an optical fiber 10, all monitoring signals of the monitoring substations 3 are transmitted to the monitoring master station 4, and are transmitted to a ground terminal 5 through a ring network 11 by the monitoring master station 4;
the monitoring of the deformation of the drill hole comprises the following steps:
step 1: digging a deformation monitoring drilling hole 8 according to the distributed points in the steps, wherein the size of the deformation monitoring drilling hole is as follows: the diameter of the drilled hole is 1.5m, and the depth of the drilled hole is 8 m;
step 2: a drilling hole deformation sensor 15 is arranged in the middle of the deformation monitoring drilling hole 8, and liquid is filled in the drilling hole deformation sensor 15 to ensure that the drilling hole deformation sensor 15 reaches enough pressure intensity and the interior of a drilling hole deformation sensor 19 is in a closed state;
and step 3: the drilling hole deformation sensor 15 is connected with the stainless steel measuring cylinder 16 by using the liquid guide pipe 7, one end of the liquid guide pipe 7 is ensured to be communicated with the drilling hole deformation sensor 15 in the connection process, and the other end of the liquid guide pipe 7 is communicated with the stainless steel measuring cylinder 16, so that liquid in the drilling hole deformation sensor 15 enters the stainless steel measuring cylinder 16 through the liquid guide pipe 7, but the liquid cannot enter the pressure transmitter 13 and only can be in contact with the surface of the pressure transmitter to receive a pressure signal;
and 4, step 4: under the influence of terrain change and mining, the roadway deforms to cause the deformation monitoring drill hole 8 to deform and extrude the drill hole deformation sensor 15, internal liquid enters the stainless steel measuring cylinder 16 through the liquid guide pipe 7 under the extrusion action of the drill hole deformation sensor 15 to generate pressure, one end of the pressure transmitter 13, which is connected with the stainless steel measuring cylinder 16, receives a pressure signal, the pressure transmitter 13 converts the pressure signal into an electric signal, and the electric signal is transmitted to the nearby monitoring substation 3 through the cable 9;
and 5: each monitoring substation 3 is connected with a monitoring master station 4 through an optical fiber 10, all monitoring signals of the monitoring substations 3 are transmitted to the monitoring master station 4, and are transmitted to a ground terminal 5 through a ring network 11 by the monitoring master station 4.
The above embodiments are only used for further detailed description of the object, technical solution and beneficial effects of the present invention, and are not used for limiting the present invention, and any modifications, equivalent substitutions, parameter improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (15)
1. The utility model provides a regional rock burst many parameters monitoring devices of big lane in colliery which characterized in that: the drilling stress monitoring device comprises a drilling stress monitoring device, a drilling deformation monitoring device, a plurality of monitoring substations, a monitoring master station and a ground terminal; one end of the drilling stress monitoring device is arranged in a stress monitoring drilling hole of one side of the roadway, the other end of the drilling stress monitoring device is fixed at the side part of the roadway, and the two ends of the drilling stress monitoring device are connected through a liquid guide pipe; one end of the drilling hole deformation monitoring device is arranged in a deformation monitoring drilling hole of one side of the roadway, the other end of the drilling hole deformation monitoring device is fixed at the side part of the roadway, and the two ends of the drilling hole deformation monitoring device are connected through a liquid guide pipe; the drilling stress monitoring device monitors a drilling stress signal in real time and transmits the drilling stress signal to a nearby monitoring substation through a cable; the drilling hole deformation monitoring device monitors a drilling hole deformation signal in real time and transmits the drilling hole deformation signal to a nearby monitoring substation through a cable; each monitoring substation transmits monitoring signals to a monitoring master station through optical fibers; and the monitoring master station transmits all monitoring signals to the ground terminal through a ring network.
2. The coal mine roadway area rock burst multi-parameter monitoring device as claimed in claim 1, wherein: the drilling stress monitoring device comprises a drilling stress sensor with one end arranged in the stress monitoring drilling hole and a pressure transmitter with the other end fixed on the roadway side part; each pressure transmitter one end and three-way valve pass through threaded connection, the three-way valve with pass through the screw thread between the drilling stress sensor catheter connection, the pressure transmitter other end pass through the cable with monitoring substation nearby is connected, each all set up one in the stress monitoring drilling stress sensor, the catheter with drilling stress sensor communicates with each other.
3. The coal mine main roadway area rock burst multi-parameter monitoring device as claimed in claim 1 or 2, wherein: the drilling hole deformation monitoring device comprises a drilling hole deformation sensor, one end of the drilling hole deformation sensor is arranged in the deformation monitoring drilling hole; the other end of the drilling hole deformation monitoring device is fixed on the roadway side part and comprises a stainless steel measuring cylinder and a pressure transmitter, and the stainless steel measuring cylinder is used for accommodating liquid overflowing from the drilling hole deformation sensor; each all set up one in the drilling deformation sensor, each drilling deformation sensor all connects one stainless steel graduated flask, each stainless steel graduated flask all connects one pressure transmitter for receiving drilling deformation signal, each pressure transmitter one end is connected with the stainless steel graduated flask, the other end pass through the cable with monitoring substation nearby connects, each drilling deformation sensor and each stainless steel graduated flask in the middle of pass through liquid pipe connection.
4. The coal mine roadway area rock burst multi-parameter monitoring device as claimed in claim 1, wherein: the stress monitoring drill holes are formed in one side of the coal mine main roadway, the diameter of each drill hole is 42mm, the depth of each drill hole is 9m, and the distance between every two adjacent drill holes is 30-50 m.
5. The coal mine roadway area rock burst multi-parameter monitoring device as claimed in claim 1, wherein: the deformation monitoring drill holes are formed in one side of the coal mine roadway, the diameter of each drill hole is 150mm, the depth of each drill hole is 8m, and the distance between every two adjacent drill holes is 30-50 m.
6. The coal mine roadway area rock burst multi-parameter monitoring device as claimed in claim 1, wherein: the stress monitoring drill hole is connected with the deformation monitoring drill hole, the stress monitoring drill hole continues to be deeply dug for 1m on the basis of the deformation monitoring drill hole, and the central positions of the stress monitoring drill hole and the deformation monitoring drill hole are the same circle center.
7. The coal mine roadway area rock burst multi-parameter monitoring device as claimed in claim 1, wherein: the monitoring device is connected with the nearby monitoring substations through communication cables, and each monitoring substation is connected with the monitoring master station through optical fibers.
8. The coal mine roadway area rock burst multi-parameter monitoring device as claimed in claim 1, wherein: all the monitoring sub-stations and all the monitoring main stations are arranged underground.
9. The coal mine roadway area rock burst multi-parameter monitoring device as claimed in claim 2, wherein: the drilling stress sensor in the drilling stress monitoring device is placed at the deepest position of the stress monitoring drill hole, and the drilling deformation sensor in the drilling deformation monitoring device is placed at the middle position of the deformation monitoring drill hole.
10. The coal mine roadway area rock burst multi-parameter monitoring device as claimed in claim 2, wherein: the borehole stress sensor has a length of 30 cm.
11. The coal mine roadway area rock burst multi-parameter monitoring device as claimed in claim 3, wherein: the length of the drilling hole deformation sensor is 40 cm.
12. The coal mine roadway area rock burst multi-parameter monitoring device as claimed in claim 2, wherein: among the drilling stress monitoring devices drilling stress sensor puts into behind the stress monitoring drilling, through the three-way valve to inject suitable liquid into drilling stress sensor, make its internal pressure reach 5MP, receive the influence of mining process and stratum motion, the surrounding rock stress concentrates gradually in the drilling and forces the rock mass to strike the tendency aggravation, and drilling stress sensor is at the monitoring process, two upper and lower stainless steel sheets receive drilling stress effect extrusion oil pocket, drilling stress sensor is under the extrusion, inside liquid gets into the catheter, produces pressure, pressure transmitter received signal, through the cable arrives signal transmission near the monitoring sub-station.
13. The coal mine roadway area rock burst multi-parameter monitoring device as claimed in claim 2, wherein: drilling among the drilling deformation monitoring devices deformation sensor is put into behind the deformation monitoring drilling, fill liquid, the monitoring process drilling is owing to adopt the influence to take place to warp, the extrusion drilling deformation sensor, liquid in the drilling deformation sensor passes through the liquid pipe flows in the stainless steel graduated flask, through pressure transmitter receives drilling deformation signal, through communication cable arrives signal transmission the monitoring substation nearby.
14. The coal mine roadway area rock burst multi-parameter monitoring device as claimed in claim 3, wherein: the stainless steel measuring cylinder is designed to be a cylinder with openings at two ends, the diameter of the cylinder is 20mm, the height of the cylinder is 0.5m, and two ends of the stainless steel measuring cylinder are respectively connected with the liquid guide pipe and the pressure transmitter.
15. A method of multiparameter monitoring using the apparatus of any one of claims 1-14, including borehole stress monitoring and borehole deformation monitoring, characterized by:
wherein: the borehole stress monitoring comprises:
step 1: determining a monitoring range and a large roadway area according to mine geological conditions and mine mining conditions, arranging measuring points at intervals of 30-50 m at two sides of the large roadway in a staggered manner, and excavating and establishing drill holes according to the arranged measuring points, wherein firstly, a drilling machine is used for excavating and establishing deformation monitoring drill holes, and the size of the deformation monitoring drill holes is as follows: the diameter of the drilled hole is 0.15m, and the depth of the drilled hole is 8 m; secondly, go deep into to dig on the basis of deformation monitoring drilling and establish stress monitoring drilling, its size of dimensions is: the diameter of the drilled hole is 0.15m, and the depth of the drilled hole is 8 m; the central positions of the two drill holes are the same circle center; the measuring points are arranged on the two sides of the main roadway to form a space structure, and the space position of the whole main roadway is monitored in an all-round manner;
step 2: installing a drilling stress sensor at the deepest position of a stress monitoring drill hole, opening a three-way valve connected with the drilling stress sensor to inject a proper amount of liquid into the drilling stress sensor, ensuring that the rated pressure in the drilling stress sensor reaches 5MP, and screwing down the three-way valve to enable the interior of the drilling stress sensor to be in a closed state;
connecting the drilling stress sensor with the pressure transmitter by using a liquid guide pipe, wherein one end of the liquid guide pipe is ensured to be communicated with the drilling stress sensor in the drilling stress monitoring device in the connection process, so that liquid in the drilling stress sensor flows into the liquid guide pipe, and the other end of the liquid guide pipe is connected with the pressure transmitter, but the liquid cannot enter the pressure transmitter and can only be contacted with the surface of the pressure transmitter to receive a pressure signal;
and 4, step 4: under the influence of terrain change and mining, drilling stress is gradually concentrated to force a rock mass to have an impact tendency, the drilling stress sensor is extruded by the upper stainless steel sheet and the lower stainless steel sheet under the action of the drilling stress in the monitoring process, internal liquid enters the liquid guide pipe under the extrusion action of the drilling stress sensor to generate pressure, one end of the pressure transmitter, which is connected with the liquid guide pipe, receives a pressure signal, converts the pressure signal into an electric signal, and transmits the signal to the nearby monitoring substation through a cable;
and 5: each monitoring substation is connected with a monitoring master station through optical fibers, all monitoring signals of the monitoring substations are transmitted to the monitoring master station, and the monitoring master station transmits the monitoring signals to a ground terminal through a ring network;
the borehole deformation monitoring comprises:
step 1: digging deformation monitoring drill holes according to the distribution points;
step 2: a drilling hole deformation sensor is arranged in the middle of the deformation monitoring drilling hole, and liquid is filled into the drilling hole deformation sensor to ensure that the drilling hole deformation sensor reaches enough pressure intensity and the interior of the drilling hole deformation sensor is in a closed state;
and step 3: the drilling hole deformation sensor is connected with the stainless steel measuring cylinder by using the liquid guide pipe, one end of the liquid guide pipe is communicated with the drilling hole deformation sensor in the connecting process, and the other end of the liquid guide pipe is communicated with the stainless steel measuring cylinder, so that liquid in the drilling hole deformation sensor enters the stainless steel measuring cylinder through the liquid guide pipe, but the liquid cannot enter the pressure transmitter and only can be contacted with the surface of the pressure transmitter to receive a pressure intensity signal;
and 4, step 4: under the influence of terrain change and mining, the deformation of the roadway causes deformation of the deformation monitoring drill hole to extrude the drill hole deformation sensor, the internal liquid of the drill hole deformation sensor enters the stainless steel graduated cylinder through the liquid guide pipe under the extrusion action to generate pressure, one end of the pressure transmitter, which is connected with the stainless steel graduated cylinder, receives a pressure signal, converts the pressure signal into an electric signal, and transmits the signal to the nearby monitoring substation through a cable;
and 5: each monitoring substation is connected with a monitoring master station through optical fibers, all monitoring signals of the monitoring substations are transmitted to the monitoring master station, and the monitoring master station transmits the monitoring signals to a ground terminal through a ring network.
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