综放大断面回采巷道底鼓诱因分析及控制技术  

Causes Analysis and Control Technology for Floor Heave Mining Roadway with Large Cross-section in Fully Mechanized Top Coal Caving Face

作　　者：赵启峰[1,2] 高文蛟[1,2] 牛国星 雍涛[2] 刘媛媛[4] 

机构地区：[1]河北省矿井灾害防治重点实验室,北京东燕郊101601 [2]华北科技学院安全工程学院,北京东燕郊101601 [3]中煤平朔集团有限公司井工一矿,山西朔州036800 [4]华北科技学院安全培训处,北京东燕郊101601

出　　处：《煤炭工程》2014年第6期39-42,共4页Coal Engineering

基　　金：河北省矿井灾害防治重点实验室资助(KJZH2013S03);中央高校基本科研业务费资助(3142013035)

摘　　要：针对中煤平朔井工一矿4107等综放面回采巷道剧烈底鼓现象，分析了综放大断面回采巷道围岩条件及底鼓发生机理，提出了“卸压与加固联合”的底鼓控制措施，即开凿卸压槽与优化帮角锚网支护参数相结合，通过现场实测巷道底板破坏深度，确定卸压槽开凿深度为0．6—0．8m。工程实践表明：巷道最大底鼓量为227mm，最大底鼓速率为38．5mm／d，底鼓量及变形速率均在可控范围之内，确保了大断面回采巷道围岩的稳定。Aiming at the severe floor heave of mining roadway in fully mechanized top coal caving face in No. 1 underground coal mine of China Coal Pingshuo Group Co. , ltd, the conditions of surrounding rock were analyzed, and the mechanism was studied for the floor heave of mining roadway with large cross - section in fully mechanized top coal caving face. The combined controlling measure of pressure - relief and reinforced support was proposed, combining excavation of pressure - relief cutting and optimization of roadway - side supporting parameters. According to field test of roadway floor damage depth, the digging depth of pressure - relief cutting was within 0. 6 - 0. 8m. The engineering practices showed that, the maximum displacement and the maximum rate of floor heave were 227 mm and 38. 5mm/d, the displacement and rate of floor heave were with controllable range, ensuring the stability of surrounding rock in mining roadway.

关 键 词：大断面煤巷 底鼓诱因 底角锚杆 卸压槽 底鼓控制 

分 类 号：TD353[矿业工程—矿井建设]