建井技术
建井技術
건정기술
2014年
6期
30-32,7
,共4页
软岩巷道%底鼓%卸压槽%反底拱%治理
軟巖巷道%底鼓%卸壓槽%反底拱%治理
연암항도%저고%사압조%반저공%치리
mine soft rock roadway%floor heave%pressure releasing groove%reverse floor arch%control
在建矿井奇台一矿主采B3煤层，厚度约22m ，埋深518～540m。中央辅助运输大巷沿煤层底板掘进。底板属极软岩，遇水易膨胀，出现底鼓现象。巷道掘进后，底板即鼓起，且速度较快，平均底鼓速度达10mm／d ，原采用常规浇筑混凝土底板的办法来加以治理，未获成功。后根据具体情况，在巷道底板中间开挖卸压槽，并采用反底拱支护方式来治理底鼓，效果良好，为软岩巷道底鼓治理提供了新的经验。
在建礦井奇檯一礦主採B3煤層，厚度約22m ，埋深518～540m。中央輔助運輸大巷沿煤層底闆掘進。底闆屬極軟巖，遇水易膨脹，齣現底鼓現象。巷道掘進後，底闆即鼓起，且速度較快，平均底鼓速度達10mm／d ，原採用常規澆築混凝土底闆的辦法來加以治理，未穫成功。後根據具體情況，在巷道底闆中間開挖卸壓槽，併採用反底拱支護方式來治理底鼓，效果良好，為軟巖巷道底鼓治理提供瞭新的經驗。
재건광정기태일광주채B3매층，후도약22m ，매심518～540m。중앙보조운수대항연매층저판굴진。저판속겁연암，우수역팽창，출현저고현상。항도굴진후，저판즉고기，차속도교쾌，평균저고속도체10mm／d ，원채용상규요축혼응토저판적판법래가이치리，미획성공。후근거구체정황，재항도저판중간개알사압조，병채용반저공지호방식래치리저고，효과량호，위연암항도저고치리제공료신적경험。
In a construction mine of Qitai No.1 mine ,a main mining seam was B3 seam ,a thickness of the seam was about 22m and a depth of the seam was 518~540m. A mine central auxiliary transporta‐tion roadway was headed along the seam floor. The seam floor was an ultra soft rock ,could be easily swelled with water and would cause a floor heave phenomenon.After the mine roadway headed ,the floor would be soon heaved ,the heave speed was fast and an average floor heave speed was 10mm/day. A previous conventional method with a site pouring concrete floor was applied to control the floor heave and the method was not success.Late ,according to the certain condition ,a pressure releasing groove was excavated in the middle of the mine roadway ,a reverse floor arch support method was ap‐plied to control the floor heave and excellent effect was obtained. Thus a new experience was provided to the floor heave control of the mine soft rock roadway.
