CN115099720B - Tracing method for coal measure stratum surrounding rock gas outburst - Google Patents
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Abstract
The invention belongs to the technical field of coal and gas outburst prevention and control, and particularly relates to a source tracing method for coal measure stratum surrounding rock gas outburst. Includes the following steps, collecting the data of coal and gas outburst cases; judging whether the coal seam has surrounding rock gas outburst conditions or not according to the collected data, and tracing if the coal seam has the surrounding rock gas outburst conditions; judging whether the coal bed with surrounding rock gas outburst conditions has surrounding rock gas or not; if the surrounding rock gas exists, drilling a hole in the analyzed surrounding rock gas area, verifying whether the surrounding rock gas exists in the surrounding rock, and judging whether the surrounding rock gas is a coal and gas outburst power source; and obtaining a clear conclusion that the gas of the surrounding rock of the coal seam roof is a prominent source or the gas of the surrounding rock of the coal seam floor is a prominent source, and guiding the targeted treatment. The invention traces the source of the coal and gas outburst under the deposition condition of the storage cap, so as to facilitate the targeted treatment and ensure the mining safety.
Description
Technical Field
The invention belongs to the technical field of coal and gas outburst prevention and control, and particularly relates to a source tracing method for coal measure stratum surrounding rock gas outburst.
Background
The gas outburst is one of the main disasters of underground coal mine production, and seriously threatens the safe production of coal mines. The gas outburst disaster often causes a malignant accident of group death and group injury, brings huge economic loss and adverse social influence to coal enterprises, and even can cause secondary accidents such as gas explosion, coal dust explosion, fire hazard and the like.
The coal and gas outburst mechanism is still a worldwide problem so far. In order to prevent gas outburst disasters and guarantee underground safety, a large amount of manpower and material resources are put into research in coal producing countries all over the world so as to provide scientific basis for forecasting outburst danger and making outburst prevention measures. However, the gas burst mechanism has remained in the hypothesis stage until now. The regional distribution of the outburst, the reason why the gas ejection quantity exceeds the gas content of the coal seam by dozens of times or even hundreds of times during the outburst, the source of the outburst gas and the like cannot be explained, and the coal and gas outburst accidents cannot be eliminated fundamentally.
In outburst prevention measures, according to 209 th coal mine safety regulation (2022 edition), the coal mine in China is drilled with layer-crossing holes to pre-pump the holes of outburst prevention measures of coal seam gas areas in coal roadway strips, and the whole coal roadway and coal seams in certain ranges on two sides of the coal roadway should be controlled. The method of protecting the coal roadway by the rock roadway is adopted, most of gas protrudes out of the mine, two bottom plate rock roadways are pre-dug below two roadways on a stope face, coal bed gas is extracted by drilling holes into the coal bed through the rock roadways, and the drilling footage is generally dozens of kilometers; and a roof rock roadway is additionally arranged at the upper part of the return airway of a few mines and is used as an extraction roadway. By adopting the method, a large amount of rock roadway tunneling is caused, the coal mining cost is increased rapidly, the tunneling and the replacement are tense, and the mine productivity is reduced. However, since the coal and gas outburst mechanism is not overcome, even if the outburst is eliminated according to the above method, coal and gas outburst accidents still occur occasionally.
Through practical research and theoretical exploration on coal and gas outburst, the technical personnel of the applicant provide three necessary conditions for coal and gas outburst: forming a closed, voided body; the geological body is internally provided with gas elastic energy accumulation; excavation disturbances cause disruption of the geological seal. Classification of the gas outburst regional distribution is proposed based on the above conditions: coal uncovering is prominent; surrounding rock gas outburst; and (4) gas outburst of adjacent coal seams and gas outburst of geological abnormal areas. The gas outburst in the geological abnormal area is divided into: protruding tectonic coal mainly sealed by minced edge coal; the gas in the other disc of the coal bed mainly sealed by the reverse fault is protruded; a gas projection dominated by a rock wall closure and a gas projection dominated by a collapse column closure.
For the source tracing of the surrounding rock gas, no relevant technical research is available in the field. Conventionally, the gas is considered to be generated in a coal seam, stored in the coal seam and belongs to self-generation and self-storage, so that the control objects are mainly concentrated in the coal seam exploitation. The application artificially changes the cognitive limitation of the previous work of preventing and controlling the coal and gas outburst, and considers the center of gravity of the coal and gas prevention and control in the whole coal-series stratum, and considers that the gas is generated in the coal bed and stored in the coal-series stratum, and the coal and gas outburst is prevented and controlled to be expanded to the whole coal-series stratum, so that a gas outburst source is found in the coal-series stratum, and a basis is provided for the targeted control of the gas outburst in the next step.
Disclosure of Invention
The invention provides a tracing method for coal measure stratum surrounding rock gas outburst, aiming at solving the problem of tracing the surrounding rock gas.
The invention adopts the following technical scheme: a tracing method for coal measure strata surrounding rock gas outburst comprises the following steps of S100 collecting coal and gas outburst cases, coal and gas outburst warning data, geological reports, hydrogeological data, tectonic geology, gas geology, ground geophysical prospecting, underground geophysical prospecting, reconnaissance, gas reports, gas monitoring data and rock fracture rose maps; s200, judging whether the coal seam has surrounding rock gas outburst conditions or not according to the collected data, and tracing if the coal seam has the surrounding rock gas outburst conditions; s300, judging whether surrounding rock gas exists in the coal seam with the surrounding rock gas outburst condition in S200; s400, drilling a hole in the analyzed surrounding rock gas area if the surrounding rock gas exists according to the judgment result of the S300, verifying whether the surrounding rock gas exists in the surrounding rock, and judging whether the surrounding rock gas is a coal and gas outburst power source; and S500, obtaining a clear conclusion that the gas of the surrounding rock of the coal seam roof is a outburst source or the gas of the surrounding rock of the coal seam floor is the outburst source according to the drilling result of the S400, and guiding the targeted treatment.
Step S100, judging whether the type of coal is a rock-coal two-stacking system or not through a geological report, and obtaining lithology of overlying and underlying rock layers of the coal bed; judging the type of the reservoir cap by using the comprehensive histogram and the drilling histogram in the geological report, and determining a gas generation layer, a rock reservoir and a cover layer of the coal bed and the adjacent coal bed; obtaining the geological structure, the position of a fold, a collapse column and the invasion condition of the rock pulp through the structural geological data; judging the relation between the main aquifer and the coal bed according to the hydrogeological data; acquiring a gas content contour map through gas geological data; the coal and gas outburst accident positions in the past year are obtained through coal and gas outburst cases, coal and gas outburst precursor data, gas reports and gas monitoring data.
S201, analyzing the comprehensive histogram and the drilling histogram, and judging whether the coal seam belongs to a single coal seam or not; s202, analyzing the intrusion condition of the rock pulp and judging whether the rock pulp intrudes into a mine; s203, analyzing the position of the collapse column, and judging whether the collapse column exists in the excavation area or not; s204, analyzing fault conditions, and judging whether a mining area has a reverse fault with a thickness larger than one coal thickness; s205, analyzing fault conditions, and judging whether a medium fault more than or equal to 10 meters exists in a mining area; s206, according to the judgment result of S201-S206, if one or more than one of the conditions are included, tracing the surrounding rock gas, and if the conditions do not exist, not tracing the surrounding rock gas.
S301, analyzing the gas geology to judge whether surrounding rock gas exists or not, and judging the subsequent steps if the surrounding rock gas does not exist; s302, judging whether the gas is surrounding rock gas or not according to the prominent sign, and if not, carrying out subsequent steps; s303, judging whether the gas outburst is surrounding rock gas or not after the gas outburst happens in the coal roadway tunneling, and performing subsequent steps if the gas outburst is not the surrounding rock gas; s304, judging whether the gas of the surrounding rock is outburst on a stope face, and judging whether the gas of the surrounding rock exists after the top and bottom rock layers are cracked, collapsed or disturbed and activated by faults in the stope process and the gas is abnormal in emission.
The specific determination process of step S301 is: a: on a gas geological map, no large geological structure is displayed, but positions where continuous outburst occurs in one region; b: in a mine gas geological map, the isoline of gas content per ton of coal is abnormal, or the gas content per ton of drilled holes is abnormal, namely the gas content per ton of drilled holes in a shallow part is high, and the gas content per ton of drilled holes in a deep part is low; if there are two cases, the surrounding rock gas is considered to be present, and if there are no two cases, the subsequent step is determined.
The specific determination process of step S302 is: a: the coal wall becomes cold, and the air temperature drops; b: the odor of the eggs exists; and if one of the conditions exists, the surrounding rock gas is considered to exist, and if the one of the conditions does not exist, the subsequent step judgment is carried out.
The specific determination process of step S303 is:
a: finding the gas outburst place at the ground stress concentration;
b: when the gas concentration is more than or equal to 40%, determining that surrounding rock gas is protruded and exists, and when the gas concentration is less than 40%, performing next judgment;
c: calculating the gas outburst abnormal coefficient,
X=
in the formula
X: a gas outburst anomaly coefficient;
V projection : total amount of gas outburst, m 3 ；
W: original gas content of coal bed, m 3 /t；
G: projecting coal amount, t;
V surge of : gas emission amount during normal tunneling;
and when the gas outburst abnormal coefficient X is larger than or equal to 15, judging that the surrounding rock gas outburst exists, and when the gas outburst abnormal coefficient X is smaller than 15, performing subsequent judgment.
In step S400, the borehole gas extraction flow reaches 0.25m 3 The stable extraction time is 4 hours, if the gas concentration is more than 30 percent and the gas pressure is more than or equal to 0.5MPa, the gas of the surrounding rock of the layer is judged to have outburst danger, and the rock reservoir is a coal and gas outburst power source; and if the drilling test data do not accord with the analysis judgment, redesigning the drill hole of the drill site and retesting.
Compared with the prior art, the invention has the following beneficial effects: the invention is utilized to trace the source of the coal and gas outburst under the deposition condition of the storage cap, so as to facilitate the targeted treatment and ensure the mining safety; compared with the existing treatment method, the method can save the tunneling cost of two rock roadways of the stope face, reduce the environmental pollution caused by rock shaft raising, reduce the drilling amount of the extraction drill holes of the rock roadways, reduce the construction cost and the number of the drill holes, ensure the mining succession, improve the production capacity of a mine and promote the safety benefit, the economic benefit and the social benefit.
Drawings
FIG. 1 is a tracing flow chart of coal and gas outburst according to the invention;
FIG. 2 is a schematic view of a protruding hole;
FIG. 3 is a schematic view of gas generation and treatment;
FIG. 4 is a schematic diagram of a gas verification borehole for surrounding rock of a certain coal mine roof;
FIG. 5 is a gas verification drilling design diagram of a coal mine floor surrounding rock.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; all other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the conventional coal and gas prevention and control work, because of cognitive limitations and the like, the gas is considered to be generated in a coal seam, stored in the coal seam and belongs to self-generation and self-storage, and therefore, the prevention and control objects are mainly concentrated on mining the coal seam. The coal and gas control is considered in the whole coal-series stratum, the gas is considered to be generated in the coal bed and stored in the coal-series stratum, the coal and gas control and prevention method has the advantages of self-generation and self-storage, the coal and gas outburst control and prevention are expanded to the whole coal-series stratum, a gas outburst source is found in the coal-series stratum, and a basis is provided for targeted control.
The application range of the invention is as follows:
1. identifying the coal and gas outburst mine under the deposition condition of the raw storage cover;
2. under the condition of raw storage cover deposition, a mine with prominent symptoms is provided.
3. And under the condition of raw storage cover deposition, gas gushes out of an abnormal mine.
A tracing method for coal measure stratum surrounding rock gas outburst comprises the following steps:
s100, collecting coal and gas outburst cases, coal and gas outburst warning data, geological reports, hydrogeological data, tectonic geology, gas geology, ground geophysical prospecting, underground geophysical prospecting, reconnaissance, gas reports, gas monitoring data and rock fracture rose diagrams.
And judging whether the type of the coal is a rock-carbon two-stacking system or not through a geological report, and obtaining lithology (sandstone, limestone and mudstone) of rock layers above and below the coal bed.
And judging the type of the reservoir cap by using the comprehensive histogram and the drilling histogram in the geological report, and determining a gas generation layer, a rock reservoir and a cover layer of the coal seam and the adjacent coal seams.
And (3) acquiring geological structures (normal faults and reverse faults), ruffles (synclines and anticlines), collapse positions of columns and rock pulp invasion conditions through the structural geological data.
And judging the relation between the main aquifer and the coal bed through the hydrogeological data.
And acquiring a gas content contour map through gas geological data.
The coal and gas outburst accident positions in the past year are obtained through coal and gas outburst cases, coal and gas outburst precursor data, gas reports and gas monitoring data.
S200, judging whether the coal bed has the surrounding rock gas outburst condition or not according to the collected data, and tracing (excluding method) if the coal bed has the surrounding rock gas outburst condition.
S201, analyzing the comprehensive histogram and the drilling histogram, judging whether the coal seam belongs to a single coal seam, and eliminating gas outburst of adjacent coal seams.
S202, analyzing the intrusion condition of the rock pulp, judging whether the rock pulp intrudes into a mine or not, and removing gas outburst mainly caused by rock wall sealing.
S203, analyzing the position of the collapse column, judging whether the excavation area has the collapse column or not, and removing the gas outburst mainly comprising the collapse column.
S204, analyzing fault conditions, judging whether a mining area has a reverse fault with a thickness larger than one coal thickness, and eliminating gas outburst of another coal seam of the fault.
S205, analyzing fault conditions, judging whether a medium-sized fault more than or equal to 10 meters exists in a mining area, and eliminating tectonic coal outburst mainly comprising sealed minced coal.
S206, according to the judgment result of S201-S206, if one or more of the situations are included, tracing the gas of the surrounding rock is performed, and if the situations do not exist, tracing the gas of the surrounding rock is not performed.
S300-judging whether the coal bed with the surrounding rock gas outburst condition has surrounding rock gas or not in S200 (causal control analysis).
The specific process of step S300 is,
s301, analyzing the gas geology, judging whether surrounding rock gas exists or not, and judging the subsequent steps if the surrounding rock gas does not exist.
A: on a gas geological map, no large geological structure is displayed, but positions where continuous outburst occurs in one region; the result is caused by migration and supplement of the surrounding rock gas, and the surrounding rock gas is judged.
B: in a mine gas geological map, an isoline of gas content per ton of coal is abnormal, or the gas content per ton of drilled holes is abnormal, namely the gas content per ton of drilled holes in a shallow part is high, and the gas content per ton of drilled holes in a deep part is low. The gas in the deep coal seam enters the surrounding rock, which indicates that the gas in the surrounding rock exists.
If there are two cases, the surrounding rock gas is considered to be present, and if there are no two cases, the subsequent step is determined.
S302, judging whether the gas is the surrounding rock gas or not according to the prominent sign, and if not, carrying out the subsequent steps.
The specific determination process of step S302 is:
a: the rock reservoir is a water-bearing stratum, after the sealing is damaged, the water rate of capillary water and the water-bearing stratum enters the coal bed firstly, then high-pressure gas in the rock reservoir enters the coal bed, the water temperature of the water-bearing stratum in the rock reservoir is low, the coal wall is cooled, and the air temperature is reduced.
B: the rock reservoir is a water-bearing stratum, water contains hydrogen sulfide, gas components also contain hydrogen sulfide, and the smell of the hydrogen sulfide is the smell of rotten eggs.
And if one of the conditions exists, the surrounding rock gas is considered to exist, and if the one of the conditions does not exist, the subsequent step judgment is carried out.
S303, judging whether the gas outburst is surrounding rock gas or not after the gas outburst happens in the coal roadway tunneling, and performing subsequent steps if the gas outburst is not the surrounding rock gas.
The specific determination process of step S303 is:
a: finding the gas outburst place at the ground stress concentration; the outburst place is tunneled in a coal roadway, and the place with gas outburst generally has the characteristics of small fault, coal thickness change, coal bed inclination angle change and coal bed-to-surrounding rock stratum interval change. The parts easy to protrude all belong to the ground stress concentration parts, surrounding rocks at the ground stress concentration parts are stressed and concentrated and have weak surfaces, and surrounding rock gas is easy to protrude along the rock stratum weak surfaces at the ground stress concentration parts.
B: and when the gas is outburst, the gas concentration is high, when the gas concentration is more than or equal to 40%, the gas is considered to be outburst of the surrounding rock, the gas of the surrounding rock exists, and when the gas concentration is less than 40%, the next judgment is carried out. Because the gas of the surrounding rock is mainly dissociated, the gas migration is mainly seepage, and the concentration is high.
C: calculating the gas outburst abnormal coefficient,
X=
in the formula
X: a gas outburst anomaly coefficient;
V projection : total amount of projected gas, m 3 ；
W: original gas content of coal bed, m 3 /t；
G: projecting coal amount, t;
V surge of : gas emission amount during normal tunneling;
and when the gas outburst abnormal coefficient X is larger than or equal to 15, judging that the surrounding rock gas outburst exists, and when the gas outburst abnormal coefficient X is smaller than 15, performing subsequent judgment.
The protruding shape is that the protruding hole is pear-shaped, inverted bottle-shaped and the like with a small mouth and a large cavity. The position of the cavity and the position of the inverted bottle are usually opposite to the gas pressure, and the positions of the pear handle and the bottle cover are usually the positions with the pressure, so that the direction of the force can be determined.
When the rock burst exists, the rock burst is often rocks near the fault, and the top plate surrounding rock gas burst or the bottom plate surrounding rock gas burst can be judged by comparing the drilling histogram near the fault. And judging whether the gas outburst phenomenon is the surrounding rock gas and the storage position or not by integrating the coal roadway tunneling gas outburst phenomenon.
S304, judging the surrounding rock gas outburst on a stope face, and judging that the surrounding rock gas exists if the gas is abnormally gushed out after the top and bottom rock layers are cracked, collapsed or fault disturbance and activation occurs in the stope process.
The gas outburst of the mining face surrounding rock is closely related to the structure: faults which are not found during tunneling exist in the mining face, and the faults cause protrusion before the coal face is uncovered. The gas pressure of surrounding rock is large, the advance pressure of the coal face, and the two act together to cause the fault closed structure to be damaged.
S400, after judging that surrounding rock gas exists according to S300, drilling holes in the analyzed surrounding rock gas area, verifying whether the surrounding rock gas exists in the surrounding rock, and judging whether the surrounding rock gas exists as a coal and gas outburst power source.
The gas extraction flow of the drill hole reaches 0.25m 3 The stable extraction time is 4 hours, if the gas concentration is more than 30 percent and the gas pressure is more than or equal to 0.5MPa, the gas of the surrounding rock of the layer is judged to have outburst danger, and the rock reservoir is a coal and gas outburst power source; and if the drilling test data do not accord with the analysis judgment, redesigning the drill hole of the drill site and retesting.
And S500, obtaining a definite conclusion that the coal seam roof surrounding rock gas is a protruded source or the coal seam floor surrounding rock gas is a protruded source according to the drilling result of S400, and guiding the targeted treatment.
The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy and attainment of the same are intended to fall within the scope of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are used for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms may be changed or adjusted without substantial change in the technical content.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A tracing method for coal measure stratum surrounding rock gas outburst is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
s100, collecting coal and gas outburst cases, coal and gas outburst precursor data, geological reports, hydrogeological data, tectonic geology, gas geology, ground geophysical prospecting, underground geophysical prospecting, reconnaissance, gas reports, gas monitoring data and rock fracture rose diagrams;
s200, judging whether the coal bed has surrounding rock gas outburst conditions or not according to the collected data, and tracing if the coal bed has the surrounding rock gas outburst conditions;
s300, judging whether surrounding rock gas exists in the coal seam with the surrounding rock gas outburst condition in the S200;
the specific process of step S200 is,
s201, analyzing the comprehensive histogram and the drilling histogram, and judging whether the coal seam belongs to a single coal seam;
s202, analyzing the intrusion condition of the rock pulp and judging whether the rock pulp intrudes into a mine;
s203, analyzing the position of the collapse column, and judging whether the collapse column exists in the excavation area or not;
s204, analyzing fault conditions, and judging whether a mining area has a reverse fault with a thickness larger than one coal thickness;
s205, analyzing fault conditions, and judging whether a medium-sized fault with the length being more than or equal to 10 meters exists in a mining area;
s206-according to the judgment result of S201-S205, if one or more than one of the conditions are included, tracing the surrounding rock gas, and if the conditions do not exist, not tracing the surrounding rock gas;
s400, drilling a hole in the analyzed surrounding rock gas area if the surrounding rock gas exists according to the judgment result of the S300, verifying whether the surrounding rock gas exists in the surrounding rock, and judging whether the surrounding rock gas is a coal and gas outburst power source;
and S500, obtaining a definite conclusion that the coal seam roof surrounding rock gas is a protruded source or the coal seam floor surrounding rock gas is a protruded source according to the drilling result of S400, and guiding the targeted treatment.
2. The tracing method for coal measure formation surrounding rock gas outburst according to claim 1, characterized by comprising the following steps: in the step S100, the first step,
judging whether the type of the coal is a rock-carbon two-stacking system or not through a geological report, and obtaining lithology of rock layers above and below the coal bed;
judging the type of the reservoir cap by using the comprehensive histogram and the drilling histogram in the geological report, and determining a gas generation layer, a rock reservoir and a cover layer of the coal bed and the adjacent coal bed;
obtaining the geological structure, the position of the fold curve and the collapse column and the invasion condition of the magma rock through the structural geological data;
judging the relation between the main aquifer and the coal bed according to the hydrogeological data;
acquiring a gas content contour map through gas geological data;
the coal and gas outburst accident positions in the past year are obtained through coal and gas outburst cases, coal and gas outburst precursor data, gas reports and gas monitoring data.
3. The tracing method for coal measure formation surrounding rock gas outburst according to claim 2, characterized in that: the specific process of step S300 is,
s301, analyzing the gas geology, judging whether surrounding rock gas exists or not, and judging the subsequent steps if the surrounding rock gas does not exist;
s302, judging whether surrounding rock gas exists or not according to the prominent sign, and if not, carrying out the subsequent steps;
s303, judging whether the gas outburst is surrounding rock gas or not after the gas outburst happens in the coal roadway tunneling, and performing subsequent steps if the gas outburst is not the surrounding rock gas;
s304, judging the surrounding rock gas outburst on a stope face, and judging that the surrounding rock gas exists if the gas is abnormally gushed out after the top and bottom rock layers are cracked, collapsed or fault disturbance and activation occurs in the stope process.
4. The tracing method for coal measure formation surrounding rock gas outburst according to claim 3, characterized in that: the specific determination process in step S301 is:
a: on a gas geological map, no large geological structure is displayed, but positions where continuous outburst occurs in one region;
b: on a mine gas geological map, the gas content contour line per ton of coal is abnormal, or the gas content per ton of coal in a drilled hole is abnormal;
if there are two cases, the surrounding rock gas is considered to be present, and if there are no two cases, the subsequent step is determined.
5. The tracing method for coal measure formation surrounding rock gas outburst according to claim 4, characterized in that: the specific determination process in step S302 is:
a: the wall of the coal is cooled, the temperature of the air is reduced,
b: the odor of the eggs is existed,
and if one of the conditions exists, the surrounding rock gas is considered to exist, and if the one of the conditions does not exist, the subsequent step judgment is carried out.
6. The tracing method for coal measure formation surrounding rock gas outburst according to claim 5, characterized by comprising the following steps: the specific determination process in step S303 is:
a: finding the gas outburst place at the ground stress concentration;
b: when the gas concentration is more than or equal to 40%, determining that surrounding rock gas is protruded and exists, and when the gas concentration is less than 40%, performing next judgment;
c: calculating the gas outburst abnormal coefficient,
X=
in the formula
X: a gas projection anomaly coefficient;
V projection : total amount of projected gas, m 3 ；
W: original gas content of coal bed per ton, m 3 /t；
G: projecting coal amount, t;
V surge of water : gas emission amount during normal tunneling;
and when the gas outburst abnormal coefficient X is larger than or equal to 15, judging that the surrounding rock gas outburst exists, and when the gas outburst abnormal coefficient X is smaller than 15, performing subsequent judgment.
7. The tracing method for coal measure formation surrounding rock gas outburst according to claim 6, characterized in that: in the step S400, the borehole gas extraction flow reaches 0.25m 3 The stable extraction time is 4 hours, if the gas concentration is more than 30 percent and the gas pressure is more than or equal to 0.5MPa, the gas of the surrounding rock of the layer is judged to have outburst danger, and the rock reservoir layer corresponding to the gas of the surrounding rock of the layer is a coal and gas outburst power source; and if the drilling test data do not accord with the analysis judgment, redesigning the drill hole of the drill site and retesting.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161499A (en) * | 2013-01-21 | 2013-06-19 | 中国矿业大学 | Division method for underground coal bed outburst and dangerous zones |
| WO2014023111A1 (en) * | 2012-08-08 | 2014-02-13 | 中国矿业大学 | Coal and gas burst risk parameter drilling and predicting integrated method |
| CN109578055A (en) * | 2018-11-21 | 2019-04-05 | 张登龙 | A kind of coal and CO2The control method of prominent accident |
| CN111710015A (en) * | 2020-05-21 | 2020-09-25 | 贵州工程应用技术学院 | Coal mine three-stage gas geological block division method |
| CN113063921A (en) * | 2021-03-22 | 2021-07-02 | 中煤科工集团重庆研究院有限公司 | Coal and gas outburst disaster-causing visual simulation experiment system |
| CN113153430A (en) * | 2021-03-23 | 2021-07-23 | 中国矿业大学 | Roadway surrounding rock damage acoustic emission positioning and wave velocity imaging monitoring and catastrophe early warning method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670338B (en) * | 2012-09-21 | 2016-06-15 | 新奥气化采煤有限公司 | A kind of coal bed gas and coal mining method altogether |
-
2022
- 2022-08-24 CN CN202211015639.8A patent/CN115099720B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014023111A1 (en) * | 2012-08-08 | 2014-02-13 | 中国矿业大学 | Coal and gas burst risk parameter drilling and predicting integrated method |
| CN103161499A (en) * | 2013-01-21 | 2013-06-19 | 中国矿业大学 | Division method for underground coal bed outburst and dangerous zones |
| CN109578055A (en) * | 2018-11-21 | 2019-04-05 | 张登龙 | A kind of coal and CO2The control method of prominent accident |
| CN111710015A (en) * | 2020-05-21 | 2020-09-25 | 贵州工程应用技术学院 | Coal mine three-stage gas geological block division method |
| CN113063921A (en) * | 2021-03-22 | 2021-07-02 | 中煤科工集团重庆研究院有限公司 | Coal and gas outburst disaster-causing visual simulation experiment system |
| CN113153430A (en) * | 2021-03-23 | 2021-07-23 | 中国矿业大学 | Roadway surrounding rock damage acoustic emission positioning and wave velocity imaging monitoring and catastrophe early warning method |
Non-Patent Citations (2)
| Title |
|---|
| Research on the influence of regional tectonic stress field on coal and gas outburst;Xianzhong Lian 等;《2011 Second International Conference on Mechanic Automation and Control Engineering》;20110818;2508-2511 * |
| 掘进巷道蝶型煤与瓦斯突出启动的力学机理研究;赵希栋;《中国博士学位论文全文数据库工程科技Ⅰ辑》;20180215(第02期);B021-59 * |
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