CN116044400A - Method for preventing rock burst by blocking disturbance stress wave - Google Patents
Method for preventing rock burst by blocking disturbance stress wave Download PDFInfo
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- CN116044400A CN116044400A CN202310017771.0A CN202310017771A CN116044400A CN 116044400 A CN116044400 A CN 116044400A CN 202310017771 A CN202310017771 A CN 202310017771A CN 116044400 A CN116044400 A CN 116044400A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
- E21C37/12—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure, e.g. by pulses, by explosive cartridges acting on the liquid
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
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- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses a method for preventing rock burst by blocking disturbance stress waves, which comprises the following steps: s1, collecting data, S2, analyzing, S3, analyzing a path, S4, starting drilling, S5, blasting, S6, and monitoring a rock stratum; the method for preventing rock burst by blocking disturbance stress waves needs to detect terrains in mines by using a mine geological environment detector, analyzes stress wave distribution positions, drills rock strata by using a directional drilling machine according to analyzed stress wave trend, cuts the rock strata, then places explosive into drilled holes, expands the cutting seams cut by a water gun by the explosive after detonation, releases stress in the rock strata, then fills water into the holes, reduces the occurrence probability of the stress waves, installs a ground penetrating radar in a roadway while blasting the rock strata, monitors vibration in the roadway, and prevents the roadway from impact and safety accidents when blasting the rock strata.
Description
Technical Field
The invention relates to the technical field of rock burst prevention and control, in particular to a method for preventing rock burst by blocking disturbance stress waves.
Background
Rock burst refers to a dynamic phenomenon of sudden and severe damage of coal (rock) bodies around a coal mine roadway or a working surface due to instantaneous release of elastic deformation energy. In the mining process, when the stress around the mining space or the roadway exceeds the bearing capacity of the coal rock mass, sudden dynamic damage of the coal rock mass can occur, a large amount of deformation or ejection can be instantaneously carried out to the mining space or the roadway space, a large amount of elastic energy is released, the coal rock mass is thrown out, a bracket is damaged, a ledge is raised, the roadway is blocked, personnel are injured, and a loud sound and rock mass vibration are generated, the vibration time is from a few seconds to a few tens of seconds, and the punched coal rock is from a few tons to hundreds of tons.
The rock burst causes the damage of a bracket in a mine and the blockage of a roadway, so that personnel casualties are caused, the existing method for preventing and treating the rock burst mainly comprises the steps of mining a liberation layer, filling mining, reasonable arrangement of mining areas, coal seam water injection, pressure relief blasting, large drilling pressure relief, roof presplitting blasting and the like, and when the rock burst is treated, the method can release stress by manufacturing cracks in a rock stratum, so that the probability of the rock burst is reduced, but when the rock stratum is blasted, the generated vibration has a certain influence on the roadway in the rock stratum, and the mining in the mine is disturbed.
Disclosure of Invention
The invention aims to provide a method for preventing rock burst by blocking disturbance stress waves, which aims to solve the problem that the existing method for preventing rock burst, which is proposed by the background technology, does not monitor a roadway.
In order to achieve the above purpose, the present invention provides the following technical solutions: a method for preventing rock burst by blocking disturbance stress waves, comprising the following steps:
s1, collecting geological environment data, and predicting the occurrence place of rock burst according to the environment data;
s2, sampling and analyzing a rock stratum of a predicted land according to a predicted result;
s3, analyzing the propagation path of the stress wave according to the analysis data of the acquired rock stratum and the range of the predicted position;
s4, drilling holes on the vibration source through the directional drilling machine according to the predicted result, and slotting the rock stratum by utilizing water jet;
s5, placing the explosive in the pre-drilled hole, detonating, and releasing stress in the rock stratum;
s6, installing a ground penetrating radar at the explosion position, and monitoring the rock stratum after explosion.
Preferably, the device for collecting data in S1 is a mine geological detector, and detects the geological environment of the mine and records the geological environment in the storage.
Preferably, the data detected back in S1 is analyzed by an analysis module and the areas where rock burst will likely occur are marked.
Preferably, the step S2 is to sample the predicted location according to the predicted result in the step S1, the sampling device is a exploration drilling machine, the sampled sample is sent into a laboratory, and the energy of the impact vibration source is determined according to the rock stratum attribute and the dynamic load stress wave energy analysis result of the coal rock sample.
Preferably, the propagation path of the stress wave is analyzed through the mine environment data detected in S1 and S2 and the data of the rock stratum vibration stress wave energy.
Preferably, the drilling position is positioned according to the data obtained by analysis in the step S3, the positioned position is drilled by using a directional drilling machine, and after drilling is completed, a water jet is emitted by using a high-pressure water gun to cut the rock stratum.
Preferably, the step S5 is to install the explosive in the hole according to the hole drilled in the step S4, and the explosive adopts three-level permitted type water gel explosive or emulsion explosive in a mode of uncoupled charging and forward detonation.
Preferably, in the step S5, the explosive hole is plugged with wet yellow mud, the particle size of the yellow mud is 8mm or less, and the plugging length is 15m or more.
Preferably, in the step S5, after the explosive is detonated, the stress wave propagates along the slots in the step S4, so as to generate more cracks, release the stress, and then fill the cracks, thereby reducing the probability of occurrence of the stress wave.
Preferably, in the step S6, the ground penetrating radar is installed in a roadway near the blasting ground, the result obtained by the detection is transmitted through a transmission wire, and the ground adopts a signal receiver to receive the generated electromagnetic signal.
Compared with the prior art, the invention has the beneficial effects that: the rock burst can cause damage to the bracket and blockage of the roadway, so that personnel casualties are caused, when the rock burst is prevented and treated, firstly, a mine geological environment detector is required to be used for detecting the topography in the mine, the stress wave distribution position is analyzed, a directional drilling machine is used for drilling a rock stratum according to the analyzed stress wave trend, the explosive is placed in a drilled hole, the explosive after detonation can expand the cutting gap cut by a water gun, the stress in the rock stratum is released, stress concentration is prevented, stress waves are formed, then water is injected into the hole, the occurrence of the stress waves is reduced, a ground penetrating radar is installed in the roadway while the rock stratum is blasted, vibration in the roadway is monitored, and the impact and the initiation of safety accidents to the roadway when the rock stratum is blasted are prevented.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution: a method for preventing rock burst by blocking disturbance stress waves, comprising the following steps:
s1, collecting terrain data in a mine, detecting a roadway and an underground river in the mine, simulating the terrain of the mine by using a computer according to the collected environment data, analyzing a rock burst dangerous area by using a terrain simulation map, and calibrating the dangerous area;
s2, drilling and sampling a calibrated place by using a exploration drilling machine according to the analysis result in the S1, sending the collected rock stratum sample into a laboratory for analysis, and determining the energy of an impact vibration source in the rock stratum sample according to the rock stratum attribute and the dynamic load stress wave energy analysis result of the coal rock sample;
s3, analyzing the propagation path of stress waves according to the rock stratum analysis data acquired in the S2 and the geological environment data in the S1;
s4, drilling a vibration source through a directional drilling machine according to a predicted result, and slotting a rock stratum by utilizing water jet, wherein the shape of the rock stratum is plum blossom-shaped, the cut slot can release a part of stress, and broken stone in a hole can be cleaned by water flow generated during cutting, so that the installation of a subsequent explosive is facilitated;
s5, placing explosive in the pre-drilled hole, increasing the action time of explosion stress wave in the rock by adopting a mode of uncoupled charge and forward detonation, enlarging the range of a crack area, and enabling the explosive after detonation to extend the slit cut in the S4, release concentrated stress in the rock stratum and obstruct the generation of rock burst;
s6, installing a ground penetrating radar in the roadway, monitoring the rock stratum after blasting, transmitting the vibration monitored in the roadway through a transmission wire, and enabling the ground to align the electromagnetic signals transmitted back through a signal receiver to carry out a structure, so that the state in the roadway is monitored in real time, and the roadway is prevented from being damaged.
In summary, rock burst can cause damage to brackets in mines and blockage of roadways, so that personnel casualties are caused, when the rock burst is prevented and treated, firstly, a mine geological environment detector is required to detect the topography in the mines, the distribution position of stress waves in the mines is determined by the collected data, rock strata at the determined position is sampled by a exploration drilling machine after the position is determined, the samples are sent into a laboratory after the sampling is finished, the rock stratum attribute and the dynamic load stress wave energy analysis result of coal rock samples are sent into the laboratory by a monitoring instrument, the energy of an impact vibration source is determined, the comprehensive analysis is carried out on the analyzed data and the data measured in the mine environment to obtain the approximate distribution trend of the stress waves, the rock strata is drilled by a directional drilling machine according to the analyzed stress wave trend, cutting the hole by using a high-pressure water gun after drilling, wherein the shape of the hole is plum blossom-shaped, the cut seam can release a part of stress, then explosive is placed in the drilled hole, the explosive adopts a water gel explosive or an emulsion explosive, and is charged in an uncoupled mode, so that the impact pressure of the hole wall can be reduced, a crushing area is reduced or avoided, the action time of explosion stress wave in the rock is prolonged, the range of a crack area is enlarged, the explosion energy is more sufficient, the crack in a coal seam is enlarged, the safety of deep hole explosion is improved by adopting a charging structure with an explosion detonating cord and a double-gun head forward explosion, the cut seam cut by the water gun is enlarged by the explosive after explosion, the stress in the rock stratum is released, the stress concentration is prevented, the stress wave is formed, then the hole is filled with water, the probability of the occurrence of the stress wave is reduced, while blasting the rock stratum, installing a ground penetrating radar in the roadway, monitoring vibration in the roadway, and preventing the roadway from being impacted and causing safety accidents when blasting the rock stratum.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (10)
1. A method for preventing rock burst by blocking disturbance stress waves, which is characterized by comprising the following steps:
s1, collecting geological environment data, and predicting the occurrence place of rock burst according to the environment data;
s2, sampling and analyzing a rock stratum of a predicted land according to a predicted result;
s3, analyzing the propagation path of the stress wave according to the analysis data of the acquired rock stratum and the range of the predicted position;
s4, drilling holes on the vibration source through the directional drilling machine according to the predicted result, and slotting the rock stratum by utilizing water jet;
s5, placing the explosive in the pre-drilled hole, detonating, and releasing stress in the rock stratum;
and S6, installing a ground penetrating radar in the roadway, and monitoring the rock stratum after blasting.
2. A method for preventing rock burst by blocking disturbance stress waves according to claim 1, wherein: the equipment for acquiring data in the step S1 is a mine geological detector, and detects the geological environment of the mine and records the geological environment in a storage.
3. A method for preventing rock burst by blocking disturbance stress waves according to claim 1, wherein: the data detected back by the S1 are analyzed by an analysis module, and the areas where rock burst is likely to occur are marked.
4. A method for preventing rock burst by blocking disturbance stress waves according to claim 1, wherein: and S2, sampling the predicted place according to the predicted result in the S1, wherein the sampling equipment is a prospecting drilling machine, the sampled sample is sent into a laboratory, and the energy of the impact vibration source is determined according to the rock stratum attribute and the dynamic load stress wave energy analysis result of the coal rock sample.
5. A method for preventing rock burst by blocking disturbance stress waves according to claim 1, wherein: and analyzing the propagation path of stress waves through the data of the mine environment detected in S1 and S2 and the data of the rock stratum vibration stress wave energy.
6. A method for preventing rock burst by blocking disturbance stress waves according to claim 1, wherein: and (3) positioning the drilling position according to the data obtained by analysis in the step (S3), drilling the positioned position by using a directional drilling machine, and cutting the rock stratum by using a water jet emitted by a high-pressure water gun after drilling.
7. A method for preventing rock burst by blocking disturbance stress waves according to claim 1, wherein: and S5, installing the explosive in the hole according to the hole drilled in the step S4, wherein the explosive adopts a three-level permitted water gel explosive or emulsion explosive consumed by a chemical plant in a mode of uncoupled charging and forward detonation.
8. A method for preventing rock burst by blocking disturbance stress waves according to claim 1, wherein: in the step S5, the moist yellow mud is used for plugging the explosive holes, the granularity of the yellow mud is below 8mm, and the plugging length is above 15 m.
9. A method for preventing rock burst by blocking disturbance stress waves according to claim 1, wherein: in the step S5, after the explosive is detonated, the stress wave propagates along the slots in the step S4, more cracks are generated, the stress is released, then the cracks are filled with water, and the occurrence probability of the stress wave is reduced.
10. A method for preventing rock burst by blocking disturbance stress waves according to claim 1, wherein: and S6, installing the ground penetrating radar in a roadway near the blasting ground, transmitting a detection result through a transmission wire, and receiving the generated electromagnetic signal by a signal receiver on the ground.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310017771.0A CN116044400A (en) | 2023-01-06 | 2023-01-06 | Method for preventing rock burst by blocking disturbance stress wave |
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| CN202310017771.0A CN116044400A (en) | 2023-01-06 | 2023-01-06 | Method for preventing rock burst by blocking disturbance stress wave |
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- 2023-01-06 CN CN202310017771.0A patent/CN116044400A/en active Pending
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