CN108594295A - A kind of coal seam unloading pressure by blasting effect evaluation method - Google Patents

A kind of coal seam unloading pressure by blasting effect evaluation method Download PDF

Info

Publication number
CN108594295A
CN108594295A CN201810543197.1A CN201810543197A CN108594295A CN 108594295 A CN108594295 A CN 108594295A CN 201810543197 A CN201810543197 A CN 201810543197A CN 108594295 A CN108594295 A CN 108594295A
Authority
CN
China
Prior art keywords
coal seam
energy
explosion
unloading pressure
microseismic
Prior art date
Application number
CN201810543197.1A
Other languages
Chinese (zh)
Other versions
CN108594295B (en
Inventor
夏永学
潘俊锋
王书文
冯美华
Original Assignee
天地科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 天地科技股份有限公司 filed Critical 天地科技股份有限公司
Priority to CN201810543197.1A priority Critical patent/CN108594295B/en
Publication of CN108594295A publication Critical patent/CN108594295A/en
Application granted granted Critical
Publication of CN108594295B publication Critical patent/CN108594295B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/18Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/20Arrangements of receiving elements, e.g. geophone pattern

Abstract

Coal seam unloading pressure by blasting effect evaluation method, including arrangement microseismic sensors, calculate blast hole microseismic event energy, determine judgment criterion.Operability of the present invention is high, and precision is high, as a result reliably, solves the problems, such as that demolition effect is difficult to carry out qualitative assessment.

Description

A kind of coal seam unloading pressure by blasting effect evaluation method
Technical field
The present invention relates to a kind of coal seam unloading pressure by blasting effect evaluation methods.
Background technology
Bump is that a kind of elastic energy gathered in mining work activities due to coal and rock that underground coal mine occurs is unexpected It discharges and coal and rock moment is caused to be dished out, the roadway damage even dynamic disaster of casualties.
Bump is one of the major casualty that coal mining faces.With being continuously increased for coal mining depth, impact Underground hazard and thus caused by a series of accidents such as gas, gushing water and mine shake etc. also become increasingly severe and universal. Current coal seam unloading pressure by blasting is the common method of Controlling of Coal Outburst and solution danger, relative to the means such as coal seam major diameter release, tool Have the advantages that relief range is big, quick.But effectively evaluating method is lacked to the effect of coal seam unloading pressure by blasting at present, is caused pair Whether the danger of burst of danger zone, which releases, is difficult to judge, while also bringing difficulty to the rational design of blasting parameter.
Invention content
The present invention provides a kind of coal seam unloading pressure by blasting effect evaluation methods.
The technical solution adopted by the present invention is as follows:
Coal seam unloading pressure by blasting effect evaluation method, includes the following steps:
(a) Microseismic monitoring system and several microseismic sensors are arranged in underground coal mine;
(b) outside Affected areas by mining, 3-6 coal seam blast hole of arrangement is as instrument connection, instrument connection and implementation explosion The parameter of pressure relief vent is consistent;
(c) explosion is implemented to pressure relief vent, after explosion is complete, the location information of explosion events is obtained by Microseismic monitoring system, When the horizon location error average value of the Microseismic monitoring system elements of a fix and instrument connection actual coordinate is not more than 10m, perpendicular positioning Average error is not more than 20m, then it is assumed that positioning accuracy meets detection requirement, otherwise changes Velocity model, until meeting the requirements;
(d) meet detection requirement in positioning accuracy, by the practical seat of the Microseismic monitoring system elements of a fix and instrument connection End value of the immediate value as the Microseismic monitoring system elements of a fix is marked, the elements of a fix of instrument connection thereby is achieved.Then It obtains the energy of instrument connection shock event release respectively by Microseismic monitoring system, calculates the energy of whole instrument connection shock events Average value Eb, the standard value which releases energy as coal seam explosion:
Eb=∑s Ei
In formula, Ei indicates the energy of i-th of instrument connection shock event release, and unit J, i=1 ... ..., n, n are that instrument connection is total Number;
(e) positioning and energy balane are carried out to coal seam unloading pressure by blasting event M using above-mentioned localization method;
(f) following formula is used to calculate the evaluation index P of coal seam demolition effect:
P=∑s Ej/m*Eb
In formula, m is coal seam pressure relief blast hole number, and Ej is the energy of j-th of blast hole shock event release, j= 1 ... ..., m;
(g) coal seam unloading pressure by blasting effect is evaluated using following criterion:
When P > k, explosion satisfaction unloads pressure request
In formula, k values are determined according to the danger classes of explosion position the rock burst fatalness area, and danger of burst grade is using synthesis Index method determines, 1,2,5 and 10 is taken respectively in nothing, weak, medium and thump danger zone k values.
In above-mentioned coal seam unloading pressure by blasting effect evaluation method, after j-th of blast hole explosion, it is less than 50m in radius In the region of range, when other shock events MjI having occurred in 30min, then induction events of the MjI as Mj events, to thing Part MjI carries out positioning and energy balane, and the ENERGY E j of j-th of blast hole shock event release is calculated by following formula,
Ej=Ejd+ ∑s EJI
Ejd is energy when j-th of blast hole does not consider induction event, and EjI is the energy value that i-th induces event, I= 1 ... ..., q, q are induction event number.
In above-mentioned coal seam unloading pressure by blasting effect evaluation method, the microseismic sensors include two types, and one is spies Hair style microseismic sensors are mounted in stope drift active workings inner top panel, coal seam or bottom plate;Another kind is geophone formula microseismic sensors, On roadway floor.
In above-mentioned coal seam unloading pressure by blasting effect evaluation method, when installing sonde-type microseismic sensors, first in stope drift active workings It constructs in inner top panel, coal seam or bottom plate Bolt, sonde-type microseismic sensors is then fixed on Bolt On;When geophone formula microseismic sensors are installed, the cement base station for 0.5m × 0.5m × 0.5m square of first constructing on roadway floor, Cement base station is connected by a Bolt not less than 1.5m with floor strata.
In above-mentioned coal seam unloading pressure by blasting effect evaluation method, for any one blast hole, 4 microseisms is at least installed and are passed Sensor is carried out at the same time monitoring.
In above-mentioned coal seam unloading pressure by blasting effect evaluation method, microseismic sensors installation site and the blast hole that is monitored it Between be not present tomography, goaf or karst collapse col umn.
In above-mentioned coal seam unloading pressure by blasting effect evaluation method, Affected areas by mining refers to big with nearest goaf distance outside In 350m, nearest driving face distance is more than 150m, is more than 50m apart from nearest tunnel and chamber distance.
In above-mentioned coal seam unloading pressure by blasting effect evaluation method, comprehensive evaluation refers to:
On the basis of the rock blast hazard that analysis has occurred, geologic(al) factor and production technique factor are analyzed to impact ground The influence of pressure life, determines the weighing factor of various factors, is then integrated.Risk index, which is divided into geologic(al) factor, to be commented Valence index and production technique factor evaluation index take comprehensive evaluation index value of the peak of the two as shock hazard.
Geologic(al) factor evaluation number and production technique factor evaluation index are calculated separately by subordinate list 1 and subordinate list 2.
The corresponding bump hazard index of 1 geologic(al) factor of subordinate list assesses table
The corresponding bump hazard index of 2 Mining technology condition factor of subordinate list assesses table
Comprehensive evaluation index takes the peak of geologic(al) factor evaluation number and production technique factor evaluation index.
Wt=max { Wt1, Wt2}
Danger classes classification is carried out by subordinate list 3.
3 bump danger classes of subordinate list is classified
Danger classes Risk index
A is without danger ≤0.25
The weak danger of B 0.25-0.5
C moderate risks 0.5-0.75
D is dangerous by force > 0.75
The above technical solution of the present invention has the following advantages over the prior art:
(1) unloading pressure by blasting effect evaluation method in coal seam provided by the invention, by using instrument connection and practical blast hole into The mode that row compares, the energy of concussion of blasting event is calculated using Microseismic monitoring system, and then is established unloading pressure by blasting effect and commented Valence criterion, and according to bump integrated evaluating method, the k values to monitoring region have carried out science determination, and therefore, the present invention can Operational high, precision is high, as a result reliably, solves the problems, such as that demolition effect is difficult to carry out qualitative assessment.
(2) unloading pressure by blasting effect evaluation method in coal seam provided by the invention, due to taking full advantage of Microseismic monitoring system prison Precision height is surveyed, the energy that shock event is induced to event is also calculated into shock event energy, and therefore, the present invention further improves Monitoring accuracy, improves Evaluated effect.
(3) unloading pressure by blasting effect evaluation method in coal seam provided by the invention adopts reason element and geology due to effectively eliminating Influence of the factor to Microseismic monitoring system monitoring accuracy, therefore, the present invention further improves monitoring accuracy, improves assessment Effect.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, embodiment of the present invention will be made into one below Step ground detailed description.
The coal seam unloading pressure by blasting effect evaluation method, includes the following steps:
(a) Microseismic monitoring system and several microseismic sensors are arranged in underground coal mine;
(b) outside Affected areas by mining, 3-6 coal seam blast hole of arrangement is as instrument connection, instrument connection and implementation explosion The parameter of pressure relief vent is consistent;
(c) explosion is implemented to pressure relief vent, after explosion is complete, the location information of explosion events is obtained by Microseismic monitoring system, When the horizon location error average value of the Microseismic monitoring system elements of a fix and instrument connection actual coordinate is not more than 10m, perpendicular positioning Average error is not more than 20m, then it is assumed that positioning accuracy meets detection requirement, otherwise changes Velocity model, until meeting the requirements;
(d) meet detection requirement in positioning accuracy, by the practical seat of the Microseismic monitoring system elements of a fix and instrument connection End value of the immediate value as the Microseismic monitoring system elements of a fix is marked, the elements of a fix of instrument connection thereby is achieved.Then It obtains the energy of instrument connection shock event release respectively by Microseismic monitoring system, calculates the energy of whole instrument connection shock events Average value Eb, the standard value which releases energy as coal seam explosion:
Eb=∑s Ei
In formula, Ei indicates the energy of i-th of instrument connection shock event release, and unit J, i=1 ... ..., n, n are instrument connection Sum;
(e) positioning and energy balane are carried out to coal seam unloading pressure by blasting event M using above-mentioned localization method;
(f) following formula is used to calculate the evaluation index P of coal seam demolition effect:
P=∑s Ej/m*Eb
In formula, m is coal seam pressure relief blast hole number, and Ej is the energy of j-th of blast hole shock event release, j= 1 ... ..., m;
(g) coal seam unloading pressure by blasting effect is evaluated using following criterion:
When P > k, explosion satisfaction unloads pressure request
In formula, k values are determined according to the danger classes of explosion position the rock burst fatalness area, and danger of burst grade is using synthesis Index method determines, 1,2,5 and 10 is taken respectively in nothing, weak, medium and thump danger zone k values.
After j-th of blast hole explosion, in the region that radius is less than 50m ranges, other shakes have occurred in 30min When dynamic event MjI, then induction events of the MjI as Mj events, positioning and energy balane, j-th of blast hole are carried out to event MjI The ENERGY E j of shock event release is calculated by following formula,
Ej=Ejd+ ∑s EJI
Ejd is energy when j-th of blast hole does not consider induction event, and EjI is the energy value that i-th induces event, I= 1 ... ..., q, q are induction event number.
The microseismic sensors include two types, one is sonde-type microseismic sensors, are mounted on top in stope drift active workings In plate, coal seam or bottom plate;Another kind is geophone formula microseismic sensors, is mounted on roadway floor.
When sonde-type microseismic sensors are installed, full length fastening anchor of first constructing in stope drift active workings inner top panel, coal seam or bottom plate Then sonde-type microseismic sensors are fixed on Bolt by bar;When geophone formula microseismic sensors are installed, the lanes Xian The cement base station for 0.5m × 0.5m × 0.5m square of constructing on road bottom plate, the overall length anchor that cement base station is not less than 1.5m by one Gu anchor pole is connected with floor strata.
For any one blast hole, 4 microseismic sensors are at least installed and are carried out at the same time monitoring.
Tomography, goaf or karst collapse col umn are not present between microseismic sensors installation site and the blast hole monitored.
Affected areas by mining refers to outside is more than 350m with nearest goaf distance, and nearest driving face distance is more than 150m is more than 50m apart from nearest tunnel and chamber distance.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or Variation is still in the protection scope of this invention.

Claims (7)

1. coal seam unloading pressure by blasting effect evaluation method, it is characterised in that:Include the following steps:
(a) Microseismic monitoring system and several microseismic sensors are arranged in underground coal mine;
(b) outside Affected areas by mining, 3-6 coal seam blast hole of arrangement is as instrument connection, instrument connection and the release for implementing explosion The parameter in hole is consistent;
(c) explosion is implemented to pressure relief vent, after explosion is complete, the location information of explosion events is obtained by Microseismic monitoring system, when micro- It shakes the monitoring system elements of a fix and the horizon location error average value of instrument connection actual coordinate is not more than 10m, perpendicular positioning error Average value is not more than 20m, then it is assumed that positioning accuracy meets detection requirement, otherwise changes Velocity model, until meeting the requirements;
(d) meet detection requirement in positioning accuracy, most with instrument connection actual coordinate by the Microseismic monitoring system elements of a fix End value of the close value as the Microseismic monitoring system elements of a fix, thereby is achieved the elements of a fix of instrument connection.Then pass through Microseismic monitoring system obtains the energy of instrument connection shock event release respectively, and the energy for calculating whole instrument connection shock events is average Value Eb, the standard value which releases energy as coal seam explosion:
Eb=∑s Ei
In formula, Ei indicates the energy of i-th of instrument connection shock event release, and unit J, i=1 ... ..., n, n is instrument connection sum;
(e) positioning and energy balane are carried out to coal seam unloading pressure by blasting event M using above-mentioned localization method;
(f) following formula is used to calculate the evaluation index P of coal seam demolition effect:
P=∑s Ej/m*Eb
In formula, m is coal seam pressure relief blast hole number, and Ej is the energy of j-th of blast hole shock event release, j=1 ... ..., m;
(g) coal seam unloading pressure by blasting effect is evaluated using following criterion:
When P > k, explosion satisfaction unloads pressure request
In formula, k values are determined according to the danger classes of explosion position the rock burst fatalness area, and danger of burst grade uses composite index Method determines, 1,2,5 and 10 is taken respectively in nothing, weak, medium and thump danger zone k values.
2. unloading pressure by blasting effect evaluation method in coal seam according to claim 1, it is characterised in that:
After j-th of blast hole explosion, in the region that radius is less than 50m ranges, other vibrations things have occurred in 30min When part MjI, then induction events of the MjI as Mj events, positioning and energy balane, j-th of blast hole vibrations are carried out to event MjI The ENERGY E j of event release is calculated by following formula, Ej=Ejd+ ∑s EJI
Ejd is energy when j-th of blast hole does not consider induction event, and EjI is the energy value that i-th induces event, I= 1 ... ..., q, q are induction event number.
3. unloading pressure by blasting effect evaluation method in coal seam according to claim 1 or 2, it is characterised in that:The microseism sensing Device includes two types, and one is sonde-type microseismic sensors, are mounted in stope drift active workings inner top panel, coal seam or bottom plate;It is another Kind is geophone formula microseismic sensors, is mounted on roadway floor.
4. unloading pressure by blasting effect evaluation method in coal seam according to claim 3, it is characterised in that:Sonde-type microseism is installed to pass When sensor, Bolt of first constructing in stope drift active workings inner top panel, coal seam or bottom plate, then by sonde-type microseismic sensors It is fixed on Bolt;When geophone formula microseismic sensors are installed, the 0.5m × 0.5m that first constructs on roadway floor × The cement base station of 0.5m square, cement base station are connected by a Bolt not less than 1.5m with floor strata.
5. unloading pressure by blasting effect evaluation method in coal seam according to claim 1 or 2, it is characterised in that:For any one Blast hole at least installs 4 microseismic sensors and is carried out at the same time monitoring.
6. unloading pressure by blasting effect evaluation method in coal seam according to claim 1 or 2, it is characterised in that:Microseismic sensors are pacified Tomography, goaf or karst collapse col umn are not present between holding position and the blast hole monitored.
7. unloading pressure by blasting effect evaluation method in coal seam according to any claim from 1 to 6, it is characterised in that:Institute Affected areas by mining to be stated to refer to outside with nearest goaf distance more than 350m, nearest driving face distance is more than 150m, away from It is more than 50m with a distance from nearest tunnel and chamber.
CN201810543197.1A 2018-05-31 2018-05-31 Method for evaluating coal bed blasting pressure relief effect Active CN108594295B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810543197.1A CN108594295B (en) 2018-05-31 2018-05-31 Method for evaluating coal bed blasting pressure relief effect

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810543197.1A CN108594295B (en) 2018-05-31 2018-05-31 Method for evaluating coal bed blasting pressure relief effect

Publications (2)

Publication Number Publication Date
CN108594295A true CN108594295A (en) 2018-09-28
CN108594295B CN108594295B (en) 2019-12-17

Family

ID=63630338

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810543197.1A Active CN108594295B (en) 2018-05-31 2018-05-31 Method for evaluating coal bed blasting pressure relief effect

Country Status (1)

Country Link
CN (1) CN108594295B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111119890A (en) * 2019-12-12 2020-05-08 天地科技股份有限公司 Target rock stratum determination method based on microseismic monitoring for pressure relief and scour prevention of ground fracturing area

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102425416A (en) * 2011-09-12 2012-04-25 山东科技大学 Coal mine high stress area roadway driving face impact ground pressure control method
CN103244179A (en) * 2013-04-28 2013-08-14 中国矿业大学 Assessment method for predicting underground rock burst danger of coal mine
CN103940568A (en) * 2014-04-11 2014-07-23 中国矿业大学 Method for detecting pressure relief blasting effect of hard roof
CN104389637A (en) * 2014-10-14 2015-03-04 河南理工大学 A method for determining loosening blasting danger-relieving range of coal beds with rock burst
CN104453899A (en) * 2014-11-06 2015-03-25 大同煤矿集团有限责任公司 Safety recovery method of island working surface under complicated condition
CN104763470A (en) * 2015-03-27 2015-07-08 辽宁工程技术大学 One-hole multi-index intelligent rock burst pre-warning system and method for mine
CN105350965A (en) * 2015-11-27 2016-02-24 西安科技大学 Rock burst control method for coal mining tunnel
AU2013330947B2 (en) * 2012-10-17 2016-04-07 China University Of Mining And Technology High-pressure pneumatic blasting pressure relieving and transmission increasing method
CN105626070A (en) * 2015-12-14 2016-06-01 辽宁工程技术大学 Rock burst prevention method through deep hole blasting and depressurizing
CN105863638A (en) * 2016-05-05 2016-08-17 山东唐口煤业有限公司 Method for controlling abnormal gushing of rock burst inclination coal bed gas
CN106777772A (en) * 2017-01-09 2017-05-31 辽宁工程技术大学 A kind of Rock Burst hazard prediction method based on coal or rock dynamic system
CN107169686A (en) * 2017-07-06 2017-09-15 中国神华能源股份有限公司 A kind of coal column to below roof carries out demolition effect evaluation method during explosion
CN107255435A (en) * 2017-07-19 2017-10-17 刘佳媛 A kind of underground coal mine deep hole does not radially couple unloading pressure by blasting method

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102425416A (en) * 2011-09-12 2012-04-25 山东科技大学 Coal mine high stress area roadway driving face impact ground pressure control method
AU2013330947B2 (en) * 2012-10-17 2016-04-07 China University Of Mining And Technology High-pressure pneumatic blasting pressure relieving and transmission increasing method
CN103244179A (en) * 2013-04-28 2013-08-14 中国矿业大学 Assessment method for predicting underground rock burst danger of coal mine
CN103940568A (en) * 2014-04-11 2014-07-23 中国矿业大学 Method for detecting pressure relief blasting effect of hard roof
CN104389637A (en) * 2014-10-14 2015-03-04 河南理工大学 A method for determining loosening blasting danger-relieving range of coal beds with rock burst
CN104453899A (en) * 2014-11-06 2015-03-25 大同煤矿集团有限责任公司 Safety recovery method of island working surface under complicated condition
CN104763470A (en) * 2015-03-27 2015-07-08 辽宁工程技术大学 One-hole multi-index intelligent rock burst pre-warning system and method for mine
CN105350965A (en) * 2015-11-27 2016-02-24 西安科技大学 Rock burst control method for coal mining tunnel
CN105626070A (en) * 2015-12-14 2016-06-01 辽宁工程技术大学 Rock burst prevention method through deep hole blasting and depressurizing
CN105863638A (en) * 2016-05-05 2016-08-17 山东唐口煤业有限公司 Method for controlling abnormal gushing of rock burst inclination coal bed gas
CN106777772A (en) * 2017-01-09 2017-05-31 辽宁工程技术大学 A kind of Rock Burst hazard prediction method based on coal or rock dynamic system
CN107169686A (en) * 2017-07-06 2017-09-15 中国神华能源股份有限公司 A kind of coal column to below roof carries out demolition effect evaluation method during explosion
CN107255435A (en) * 2017-07-19 2017-10-17 刘佳媛 A kind of underground coal mine deep hole does not radially couple unloading pressure by blasting method

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
刘超: "采动煤岩瓦斯动力灾害致灾机理及微震预警方法研究", 《中国博士学位论文全文数据库 工程科技I辑》 *
李志华: "采动影响下断层滑移诱发煤岩冲击机理研究", 《中国博士学位论文全文数据库 工程科技I辑》 *
潘俊锋 等: "影响冲击地压危险性评价结果的II类开采技术因素研究", 《岩土力学》 *
王慧明: "微震监测评价卸压爆破效果的方法", 《煤矿开采》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111119890A (en) * 2019-12-12 2020-05-08 天地科技股份有限公司 Target rock stratum determination method based on microseismic monitoring for pressure relief and scour prevention of ground fracturing area

Also Published As

Publication number Publication date
CN108594295B (en) 2019-12-17

Similar Documents

Publication Publication Date Title
Chen et al. Rock burst intensity classification based on the radiated energy with damage intensity at Jinping II hydropower station, China
Wen et al. A study of rockburst hazard evaluation method in coal mine
Wang et al. Numerical investigation of the dynamic mechanical state of a coal pillar during longwall mining panel extraction
Zhao et al. Case studies of rock bursts under complicated geological conditions during multi-seam mining at a depth of 800 m
Ying-Ke et al. An experimental and numerical investigation on the deformation of overlying coal seams above double-seam extraction for controlling coal mine methane emissions
CN104454010B (en) A kind of deep-well tunnel tunneling construction dynamic comprehensive monitor and early warning system and method for early warning
Mark Coal bursts in the deep longwall mines of the United States
Schatzel et al. An analysis of reservoir conditions and responses in longwall panel overburden during mining and its effect on gob gas well performance
CN103397883B (en) Mutil-coal seam mining Rock Burst method for integrated control
Senfaute et al. Micro-seismic precursory cracks prior to rock-fall on coastal chalk cliffs: a case study at Mesnil-Val, Normandie, NW France
CN105350965B (en) Press prevention and controls exploiting colliery roadway bump
CN105257339B (en) The multi-parameter integrated monitoring and pre-alarming method of driving face
Yu et al. Case study on overburden fracturing during longwall top coal caving using microseismic monitoring
CN104390537B (en) A kind of side slope pre split Blasting Excavation damage control method based on blasting vibration test
CN101458069B (en) Tunnel wall rock deformation monitoring method and monitoring system thereof
CN105626070B (en) A kind of deep hole demolition uploading pressure Controlling of Coal Outburst method
Villegas et al. Hangingwall surface subsidence at the Kiirunavaara Mine, Sweden
CN108518182B (en) Water body exploration and discharge method and device for dendritic directional drilling advanced area with multiple aquifers on top plate
Yan et al. The mechanism of bedding separation in roof strata overlying a roadway within a thick coal seam: a case study from the Pingshuo Coalfield, China
Lu et al. Microseismic signals of double-layer hard and thick igneous strata separation and fracturing
Wagner Support requirements for rockburst conditions
CN102650214A (en) Early warning method and system for on-line monitoring and analysis of mine ventilation system
CN102644482B (en) Rock burst predicting and warning method
CN104296944B (en) Testing method for air leakage of goaf under mine in earth surface direction of shallow coal seam coal mine
CN103410568A (en) Dynamic mine disaster integral early warning method and device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20200701

Address after: 101300, No. two, 1 road, Shunyi Park, Zhongguancun science and Technology Park, Beijing, Shunyi District

Patentee after: China Coal Mining Research Institute Co., Ltd

Address before: 100013 No. 5 Youth Road, Beijing, Chaoyang District

Patentee before: TIANDI SCIENCE & TECHNOLOGY Co.,Ltd.

TR01 Transfer of patent right