矿业安全与环保
礦業安全與環保
광업안전여배보
MINING SAFETY & ENVIRONMENTAL PROTECTION
2013年
5期
63-66,70
,共5页
综合物探%煤厚变化%超前探测%瓦斯治理
綜閤物探%煤厚變化%超前探測%瓦斯治理
종합물탐%매후변화%초전탐측%와사치리
integrate geophysical prospecting%variation of coal seam thickness%advance detection%gas control
新义煤矿煤层厚度变化大,煤厚对煤与瓦斯突出具有重要的控制作用。为探测掘进巷道前方煤厚变化情况,采用网络并行电法、矿井瞬变电磁法及震波超前探测综合物探技术,对12011胶带运输巷煤厚变化进行超前探测。根据3种物探手段结果综合分析,胶带运输巷正头前方20~30 m处显示有一相对低阻区,地震存在强反射相位组,此范围内存在岩性变化,主要表现为煤层变薄;胶带运输巷正头前方65~75 m 处有一相对高阻区,地震存在强反射相位组,主要表现为煤层变厚,其变化幅度较大;在正头前方30~60 m内局部可能存在煤厚变化。工程实际揭露表明,煤层赋存情况与探测结果一致,为瓦斯超前治理和巷道工程布置提供了重要参考。
新義煤礦煤層厚度變化大,煤厚對煤與瓦斯突齣具有重要的控製作用。為探測掘進巷道前方煤厚變化情況,採用網絡併行電法、礦井瞬變電磁法及震波超前探測綜閤物探技術,對12011膠帶運輸巷煤厚變化進行超前探測。根據3種物探手段結果綜閤分析,膠帶運輸巷正頭前方20~30 m處顯示有一相對低阻區,地震存在彊反射相位組,此範圍內存在巖性變化,主要錶現為煤層變薄;膠帶運輸巷正頭前方65~75 m 處有一相對高阻區,地震存在彊反射相位組,主要錶現為煤層變厚,其變化幅度較大;在正頭前方30~60 m內跼部可能存在煤厚變化。工程實際揭露錶明,煤層賦存情況與探測結果一緻,為瓦斯超前治理和巷道工程佈置提供瞭重要參攷。
신의매광매층후도변화대,매후대매여와사돌출구유중요적공제작용。위탐측굴진항도전방매후변화정황,채용망락병행전법、광정순변전자법급진파초전탐측종합물탐기술,대12011효대운수항매후변화진행초전탐측。근거3충물탐수단결과종합분석,효대운수항정두전방20~30 m처현시유일상대저조구,지진존재강반사상위조,차범위내존재암성변화,주요표현위매층변박;효대운수항정두전방65~75 m 처유일상대고조구,지진존재강반사상위조,주요표현위매층변후,기변화폭도교대;재정두전방30~60 m내국부가능존재매후변화。공정실제게로표명,매층부존정황여탐측결과일치,위와사초전치리화항도공정포치제공료중요삼고。
The coal seam thickness changes greatly in Xinyi Mine, which has important control effect on coal and gas outburst. For detecting the thickness variation of coal seams in front of the excavation roadway,advance detection was carried out on the thickness variation of coal seams in 12011 belt-haulage gateway by using the network concurrency electrical method,the mine transient electromagnetic method and seismic method. The analysis of the detection results obtained with these three geophysical prospecting techniques indicated that there was a relatively low resistivity zone about 20m to 30m away in front of the belt gateway, the earthquake showed a strong reflection phase group, and in this range, the thickness of coal seams greatly decreased;there was a relatively high resistivity zone about 65m to 75m away in front of the belt gateway,the earthquake showed a strong reflection phase group,the thickness of coal seams greatly increased;the thickness of coal seams may locally change in 30m to 60m range. Engineering practice proved that the occurrence of coal seams was consistent with the detection results, which provided an important reference for the gas prevention and control and the layout of roadway projects.