CN211819516U - Colliery rock burst stress safety monitoring system - Google Patents
Colliery rock burst stress safety monitoring system Download PDFInfo
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- CN211819516U CN211819516U CN202020062217.6U CN202020062217U CN211819516U CN 211819516 U CN211819516 U CN 211819516U CN 202020062217 U CN202020062217 U CN 202020062217U CN 211819516 U CN211819516 U CN 211819516U
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Abstract
The utility model discloses a colliery rock burst stress safety monitoring system, including horizontal stress sensor, horizontal stress sensor passes through two-way connection valve piece and connects vertical stress sensor, and horizontal stress sensor and vertical stress sensor pass through steel pipe I and steel pipe II respectively and connect three-way valve I and three-way valve II, and the horizontal and vertical stress channel interface of drilling stress collector is connected to the other end of three-way valve I and three-way valve II, and the oil feed locking cone valve I and the oil feed locking cone valve II of three-way valve I and three-way valve II are connected on the oil outlet of manual oil pump through manual oil pump oil outlet rubber tube respectively; the drilling stress collector is wirelessly connected with the pressure detection substation through an antenna on the drilling stress collector, and the pressure detection substation is transmitted to the ground monitoring room in real time through the data acquisition substation. The monitoring system has high sensitivity in reflecting the stress change of the coal seam, has obvious stress change before and during the impact display, can provide accurate monitoring data for predicting the danger of rock burst and can give an alarm in time.
Description
Technical Field
The utility model relates to a rock burst stress monitoring system, in particular to colliery rock burst stress safety monitoring system.
Background
The rock burst is a dynamic disaster which is violently damaged due to the sudden release of elastic deformation energy under the action of mining disturbance, namely, the coal rock mass around mine roadways and stopes, and is essentially caused by the sudden release of a large amount of elastic energy. Therefore, the method has great significance for monitoring and early warning of the rock burst as an important means for guaranteeing safe mining.
The existing rock burst monitoring and early warning system commonly used in coal mines mainly comprises a stress on-line monitoring system and a microseismic monitoring system. These systems play an important role in monitoring and warning of rock burst, but have many problems.
Mining induced stresses are the result of the redistribution of the original rock stresses caused by underground mining projects. At present, a hydraulic pillow type drilling stress sensor with the diameter of phi 38mm is mainly adopted for monitoring the mining stress of a coal rock mass, and the stress on-line monitoring system has the following problems in practical application:
(1) the borehole stress sensor has poor expansion performance, can bear lower initial stress (or initial bearing force), is generally 3.0-6.0 MPa, and has larger difference with the actual bearing stress of a coal rock body;
(2) the drilling stress sensor can only be used for drilling holes with small diameters of phi 42-45 mm, cannot be well coupled with a coal rock body, and cannot accurately reflect stress changes;
(3) the borehole stress sensor can only receive the stress in one direction, and actually the internal stress of the coal rock mass is in two directions, namely vertical and horizontal, so that the well-known geologists in China have the following points: "the horizontal stress component is far more important than the vertical stress component within a certain thickness of the upper layer of the crust influenced by the tectonic stress", the measurement of the corresponding stress of the foreign hamster (n.hast) in scandinavian peninsula also shows that the maximum horizontal principal stress is generally 1-2 times the vertical stress, i.e. F1max = 1-2F 2 max.
Therefore, the existing borehole stressometer has low sensitivity of reflecting the change of the coal seam stress, and the stress change is not obvious before and in the process of showing the impact, so that accurate monitoring data can not be provided for predicting the danger of rock burst.
How to accurately measure the stress of the coal rock mass mainly depends on the deformability of the coal rock mass and whether the sensor is well coupled with the coal rock mass. If the coal rock mass is quickly deformed and reaches balance after drilling and before the sensor is installed, or the deformation capacity of the coal rock mass around the drilling hole is very small, the sensor and the coal rock mass cannot be well coupled, and the magnitude of the real ground stress cannot be accurately reflected. Therefore, it is necessary to develop a pressure sensor with large expansion deformation capability, large initial load capacity or large expansion bearing capability, and capable of monitoring a pressure sensor smaller than the initial load capacity.
Disclosure of Invention
The utility model discloses a remedy prior art not enough, provide a colliery rock burst stress safety monitoring system and application method.
The utility model discloses a realize through following technical scheme: a coal mine rock burst stress safety monitoring system comprises a horizontal stress sensor, wherein the horizontal stress sensor is connected with a vertical stress sensor through a bidirectional connecting valve block, the horizontal stress sensor and the vertical stress sensor are respectively connected with a three-way valve I and a three-way valve II through a steel pipe I and a steel pipe II, the other ends of the three-way valve I and the three-way valve II are respectively connected with a horizontal stress channel interface and a vertical stress channel interface of a drilling stress collector, and an oil inlet locking cone valve I and an oil inlet locking cone valve II of the three-way valve I and the three-way valve II are respectively connected to an oil outlet of a manual oil pump through an oil outlet; the drilling stress collector is wirelessly connected with the pressure detection substation through an antenna on the drilling stress collector, and the pressure detection substation is transmitted to the ground monitoring room in real time through the data acquisition substation.
Further, horizontal stress sensor includes oil pocket I, and the both sides of oil pocket I set up left inclusion I and right inclusion II respectively.
Further, the vertical stress sensor comprises an oil bag II, and an upper inclusion body I and a lower inclusion body I are respectively arranged on two sides of the oil bag II.
Furthermore, one end of the steel pipe I is welded on the two-way connecting valve block and communicated with the oil bag I of the horizontal stress sensor, and one end of the steel pipe II is welded at an oil inlet of the oil bag II of the vertical stress sensor.
Furthermore, female joints are welded at the other ends of the steel pipe I and the steel pipe II respectively, and then the steel pipe I and the steel pipe II are connected to the three-way valve I and the three-way valve II through U-shaped pins.
Further, the manual oil pump comprises a manual oil pump handle and an oil outlet locking hand wheel.
Further, the drilling stress collector comprises an A/D conversion circuit, the A/D conversion circuit is connected with a single chip microcomputer, and the single chip microcomputer is connected with an alarm display module, a wireless data transmission module and a numerical value display module.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the monitoring system has high sensitivity of reflecting the stress change of the coal seam, has obvious stress change before and during the impact display, and can provide accurate monitoring data for predicting the rock burst danger;
(2) the ground monitoring platform can inquire and record monitoring data and a data change curve and display the monitoring data and the data change curve on a large screen in real time, and can give an alarm in time when the monitoring early warning value is exceeded, so that the ground monitoring platform is safe and reliable;
(3) the utility model provides an effective technical means for the safety monitoring of rock burst-stress on-line monitoring system, which can provide early warning and monitoring data for accurately judging the occurrence of rock burst, is a reliable guarantee for the safety production of high-mining-depth mines and supports a blue sky for the life safety of coal miners;
(4) the utility model adopts a phi 60mm drilling stress sensor, the stress area is 2.3 times of phi 38mm, the initial bearing force which can be borne is large, and the initial bearing force is close to the actual bearing stress of the coal rock mass;
(5) the phi 60mm drilling stress sensor can be used for phi 65mm drilling, has good expansibility, can be well coupled with a coal rock body, and can accurately reflect the change of coal bed stress;
(6) the phi 60mm drilling stress sensor is formed by connecting two stress sensors which are vertically arranged with each other through a two-way connecting valve block, and can monitor horizontal stress F1 and vertical stress F2 in a coal rock body;
(7) the utility model discloses the preparation of inclusion adopts macromolecular material to use lathe work, and processing is convenient, the price is moderate, easily large-scale production.
Drawings
The present invention will be further described with reference to the accompanying drawings.
FIG. 1 is an application diagram of the rock burst stress safety monitoring system of the present invention;
FIG. 2 is a diagram of the rock burst stress safety monitoring system of the present invention;
FIG. 3 is a schematic structural view of the horizontal stress sensor and the vertical stress sensor of the rock burst stress safety monitoring system of the present invention;
FIG. 4 is a schematic view of a partial structure of a horizontal stress sensor of the rock burst stress safety monitoring system of the present invention;
FIG. 5 is a structural diagram of the rock burst stress safety monitoring system of the present invention;
fig. 6 is the schematic diagram of the rock burst stress safety monitoring system of the utility model.
In the figure, 1, a horizontal stress sensor, 2, a vertical stress sensor, 3, a two-way connecting valve block, 4, a steel pipe I, 5, a steel pipe II, 6, a drilling stress collector, 7, a three-way valve I, 8, a three-way valve II, 9, a manual oil pump oil outlet rubber pipe, 10, a manual oil pump, 11, an antenna, 12, a roadway, 13, a coal wall, 14, a coal bed, 15, a drilling hole, 1-1, an oil bag I, 1-2, a left inclusion I, 1-3, a right inclusion I, 2-1, an oil bag II, 2-2, an upper inclusion I, 2-3, a lower inclusion I, 7-1, an oil inlet locking cone valve I, 8-1, an oil inlet locking cone valve II, 10-1, a manual oil pump handle, 10-2 and an oil outlet locking hand wheel.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1, 2, 5 and 6, the coal mine rock burst stress safety monitoring system comprises a horizontal stress sensor 1, the horizontal stress sensor 1 is connected with the vertical stress sensor 2 through the bidirectional connecting valve block 3, the horizontal stress sensor 1 and the vertical stress sensor 2 form a drilling stress sensor, the horizontal stress sensor 1 and the vertical stress sensor 2 are respectively connected with a three-way valve I7 and a three-way valve II 8 through a steel pipe I4 and a steel pipe II 5, the other ends of the three-way valve I7 and the three-way valve II 8 are respectively connected with a horizontal stress channel and a vertical stress interface of a drilling stress collector 6, the oil inlet locking cone valve I7-1 and the oil inlet locking cone valve II 8-1 of the three-way valve I7 and the three-way valve II 8 are respectively connected to an oil outlet of a manual oil pump 10 through an oil outlet rubber pipe 9 of the manual oil pump; the drilling stress collector 6 is wirelessly connected with the pressure detection substation through an antenna 11 on the drilling stress collector 6, and the pressure detection substation transmits the data to the ground monitoring room in real time through the data acquisition substation. The manual oil pump 10 comprises a manual oil pump handle 10-1 and an oil outlet locking hand wheel 10-2, the drilling stress collector 6 comprises an A/D conversion circuit, the A/D conversion circuit is connected with a single chip microcomputer, and the single chip microcomputer is connected with an alarm display module, a wireless data transmission module and a numerical value display module. In this embodiment, the pressure detection substation is a mining intrinsic safety type pressure detection substation, and the ground monitoring room includes a ground monitoring server and a UPS.
As shown in fig. 3-4, the horizontal stress sensor 1 comprises an oil bag i 1-1, and a left inclusion i 1-2 and a right inclusion i 1-3 are respectively arranged on two sides of the oil bag i 1-1; the vertical stress sensor 2 comprises an oil bag II 2-1, and an upper inclusion I2-2 and a lower inclusion I2-3 are respectively arranged on two sides of the oil bag II 2-1; one end of the steel pipe I4 is welded on the two-way connecting valve block 3 and is communicated with the oil bag I1-1 of the horizontal stress sensor 1, and one end of the steel pipe II 5 is welded at an oil inlet of the oil bag II 2-1 of the vertical stress sensor 2; the other ends of the steel pipe I4 and the steel pipe II 5 are respectively welded with KJ10 female joints, and the KJ series joints can realize quick connection, are convenient to detach and use; and then the three-way valve I7 and the three-way valve II 8 are connected through U-shaped pins. In the embodiment, only one oil outlet rubber tube 9 of the manual oil pump is provided, one end of the oil outlet rubber tube is arranged on the oil inlet locking cone valve I7-1, the other end of the oil outlet rubber tube is arranged on an oil outlet of the manual oil pump 10, the oil outlet rubber tube is detached after being used at the position, one end of the oil outlet rubber tube is arranged on the three-way valve II 8, and the other end of the oil outlet rubber tube is arranged on the oil outlet of the manual oil pump. The drilling stress sensor composed of the horizontal stress sensor 1 and the vertical stress sensor 2 adopts a drilling stress sensor with the diameter phi of 60mm, the initial bearing force is 2.3 times that of the original drilling stress sensor with the diameter phi of 38mm, and the drilling stress sensor can be effectively coupled with a drilling hole with the diameter phi of 65 mm; the horizontal stress sensor 1 is vertically arranged to bear horizontal stress F1, the vertical stress sensor 2 is horizontally arranged to bear vertical stress F2, the horizontal stress sensor 1 and the vertical stress sensor 2 are connected by a bidirectional connecting valve block 3, and the two stress sensors are vertically connected with each other. The oil bag I1-1 and the oil bag II 2-1 comprise oil bag sheets and oil bag oil sealing ports, the oil bag sheets are formed by rolling high-quality cold-rolled steel sheets by utilizing a stamping die, and the plastic deformation capacity is good; the two oil bag sheets are clamped by a special clamp and are welded by an automatic welding machine, automatic displacement and inert gas protection, so that the oil bag welding quality is high, no air holes and slag are generated, and the quality is reliable; the oil sealing port of the oil bag is sealed by a steel ball, and the bolt is fastened, so that gas in the oil bag can be discharged quickly, and pressure measurement is more convenient, accurate and reliable.
A use method of a coal mine rock burst stress safety monitoring system comprises the following steps:
the method comprises the following steps: a monitoring scheme is formulated, the monitoring position and the depth of a drill hole 15 are determined according to the geological conditions of the coal mine and the design parameters of a working face, and the length L +2m of a steel pipe I4 and the length L +2m of a steel pipe II 5 are determined according to the depth of the drill hole 15;
step two: drilling a drill hole 15 on a coal wall 13 of a roadway 12 to be monitored by using a coal rock drill bit;
step three: the horizontal stress sensor 1 and the vertical stress sensor 2 are conveyed to a required installation depth by a pushing rod, the horizontal stress sensor 1 is pressed to have an initial stress of 5MPa, then a manual oil pump handle 10-1 is pressed down and lifted up, an oil bag I1-1 of the horizontal stress sensor 1 is expanded to jack up a left inclusion I1-2 and a right inclusion I1-3 to be fully contacted and coupled with a coal seam 14, and an oil inlet locking cone valve I7-1 corresponding to a three-way valve I7 is locked after the oil bag I1-1 is pressed up;
step four: the manual oil pump oil outlet rubber pipe 9 is disassembled, the manual oil pump oil outlet rubber pipe 9 is communicated with a vertical stress channel connected with a drilling stress collector 6 through a corresponding three-way valve II 8, then the vertical stress sensor 2 is pressed, the initial stress is 5MPa, a handle 10-1 of the manual oil pump is pressed and lifted, an oil bag II 2-1 of the vertical stress sensor 2 is expanded to jack up an upper inclusion I2-2 and a lower inclusion I2-3 to be in full contact and coupling with a coal bed 14, and an oil inlet locking cone valve II 8-1 corresponding to the three-way valve II 8 is locked after the oil bag II 2-1 is pressed;
step five: an oil outlet locking hand wheel 10-2 of the manual oil pump 10 is loosened, the oil bag I1-1 and the oil bag II 2-1 are closed, the elastic modulus of the oil bag is smaller than that of the inclusion, and the elastic modulus of the inclusion is larger than that of the coal seam 14; when the drill hole 15 deforms, the coal seam 14 extrudes the left inclusion I1-2, the right inclusion I1-3, the upper inclusion I2-2 and the lower inclusion I2-3, the inclusions transmit the pressure of the coal seam 14 to the oil bag I1-1 and the oil bag II 2-1 to deform the oil bag I1-1 and the oil bag II 2-1, and the changed pressure is transmitted to the bidirectional drill hole stress collector 6 through hydraulic oil in the oil bag;
step six: the drilling stress collector 6 collects the variable pressure transmitted by the hydraulic oil in the oil bag I1-1 and the oil bag II 2-1, converts the horizontal and vertical stress variable quantity into an electric signal, and displays the electric signal on a nixie tube of the numerical display module in real time after the electric signal is converted by an A/D conversion circuit, and meanwhile, drilling stress monitoring data can be transmitted to the pressure detection substation through an antenna 11 on the drilling stress collector 6 in a wireless mode through a wireless network transmission technology and then transmitted to a ground monitoring room in real time through a data acquisition substation and a TCP/IP Ethernet ring network. Through the ground monitoring platform, monitoring data and data change curves can be inquired and recorded and displayed on a large screen in real time, and when the monitoring early warning value is exceeded, the alarm can be given in time, so that the system is safe and reliable.
In the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for describing the present invention but not for requiring the present invention to be constructed or operated in a specific orientation, and are not to be construed as limiting the invention. The terms "connected" and "connected" in the present invention are to be understood in a broad sense, and may be connected or detachably connected, for example; the terms may be directly connected or indirectly connected through intermediate components, and specific meanings of the terms may be understood as specific conditions by those skilled in the art.
The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
1. A colliery rock burst stress safety monitoring system which characterized in that: the device comprises a horizontal stress sensor (1), wherein the horizontal stress sensor (1) is connected with a vertical stress sensor (2) through a two-way connecting valve block (3), the horizontal stress sensor (1) and the vertical stress sensor (2) are respectively connected with a three-way valve I (7) and a three-way valve II (8) through a steel pipe I (4) and a steel pipe II (5), the other ends of the three-way valve I (7) and the three-way valve II (8) are connected with horizontal and vertical stress channel interfaces of a drilling stress collector (6), and an oil inlet locking cone valve I (7-1) and an oil inlet locking cone valve II (8-1) of the three-way valve I (7) and the three-way valve II (8) are respectively connected with an oil outlet of a manual oil pump (10) through an oil outlet rubber pipe (9; the drilling stress collector (6) is wirelessly connected with the pressure detection substation through an antenna (11) on the drilling stress collector (6), and the pressure detection substation is transmitted to the ground monitoring room in real time through the data acquisition substation.
2. The coal mine rock burst stress safety monitoring system of claim 1, wherein: the horizontal stress sensor (1) comprises an oil bag I (1-1), and a left inclusion I (1-2) and a right inclusion I (1-3) are respectively arranged on two sides of the oil bag I (1-1).
3. The coal mine rock burst stress safety monitoring system of claim 1, wherein: the vertical stress sensor (2) comprises an oil bag II (2-1), and an upper inclusion body I (2-2) and a lower inclusion body I (2-3) are respectively arranged on two sides of the oil bag II (2-1).
4. A coal mine rock burst stress safety monitoring system according to claim 2 or 3, wherein: one end of the steel pipe I (4) is welded on the two-way connecting valve block (3) and is communicated with the oil bag I (1-1) of the horizontal stress sensor (1), and one end of the steel pipe II (5) is welded at an oil inlet of the oil bag II (2-1) of the vertical stress sensor (2).
5. The coal mine rock burst stress safety monitoring system of claim 1, wherein: and the other ends of the steel pipe I (4) and the steel pipe II (5) are respectively welded with female joints and then connected to the three-way valve I (7) and the three-way valve II (8) through U-shaped pins.
6. The coal mine rock burst stress safety monitoring system of claim 1, wherein: the manual oil pump (10) comprises a manual oil pump handle (10-1) and an oil outlet locking hand wheel (10-2).
7. The coal mine rock burst stress safety monitoring system of claim 1, wherein: the drilling stress collector (6) comprises an A/D conversion circuit, the A/D conversion circuit is connected with a single chip microcomputer, and the single chip microcomputer is connected with an alarm display module, a wireless data transmission module and a numerical value display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020062217.6U CN211819516U (en) | 2020-01-13 | 2020-01-13 | Colliery rock burst stress safety monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020062217.6U CN211819516U (en) | 2020-01-13 | 2020-01-13 | Colliery rock burst stress safety monitoring system |
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| CN211819516U true CN211819516U (en) | 2020-10-30 |
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| CN202020062217.6U Active CN211819516U (en) | 2020-01-13 | 2020-01-13 | Colliery rock burst stress safety monitoring system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220905 Address after: 272000 No. 949, Fushan South Road, Zoucheng City, Jining City, Shandong Province Patentee after: Yankuang Energy Group Co.,Ltd. Patentee after: YANMEI HEZE ENERGY CHEMICAL CO.,LTD. Address before: 274700 Zhaolou coal mine, Zhaolou Town, yuncheng county, Heze City, Shandong Province Patentee before: YANMEI HEZE ENERGY CHEMICAL CO.,LTD. Patentee before: SHANDONG SUCCEED MINING SAFETY ENGINEERING Co.,Ltd. |
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| TR01 | Transfer of patent right |