8 m大采高综采工作面矿压显现规律研究.docVIP

8 m大采高综采工作面矿压显现规律研究 张立辉 李男男 神华神东煤炭集团有限责任公司补连塔煤矿 X 关注成功！ 加关注后您将方便地在 我的关注中得到本文献的被引频次变化的通知！ 新浪微博 腾讯微博 人人网 开心网 豆瓣网 网易微博 摘????要： 针对大采高综采工作面回采时矿压显现剧烈, 易发生煤壁片帮、冒顶压架等事故, 以神东矿区首个8 m大采高综采工作面为研究对象, 通过数值模拟分析得出该综采工作面支承压力峰值处于前方煤壁69 m位置, 巷帮压力峰值处于前方煤壁6 m左右位置, 以现场实际观测及支架压力数据分析对工作面回采过程中矿压显现规律进行了研究。结果表明:随着采高加大, 工作面煤壁片帮现象加剧, 矿压显现明显, 本工作面初次来压步距4044 m, 来压持续5刀, 周期来压步距为7.216.8 m, 平均10.77 m, 周期来压持续28刀, 平均4.8刀, 大致呈现“大-小”不规律相间变化趋势, 动载系数为1.361.74, 来压强度较强, 相较邻7 m采高工作面矿压显现明显, 来压步距减小, 来压强度增大, 支架阻力满足工作面支护要求, 这为同盘区接续大采高工作面安全回采提供了科学依据。 关键词： 大采高综采工作面; 神东矿区; 矿压显现; 一次采全高; 作者简介：张立辉 (1982—) , 男, 河北承德人, 高级工程师, 注册安全工程师, 现任神华神东煤炭集团公司补连塔煤矿总工程师。E-mail:knight9919@126.com 收稿日期：2017-09-30 Study on strata behavior law of fully-mechanized mining face with 8 m large mining height ZHANG Lihui LI Nannan Bulianta Coal Mine, Shenhua Shendong Coal Group Corporation Limited; Abstract： According to the fully-mechanized mining face with large mining height when the mine pressure appear more intense, prone to coal wall, roof pressure frame and other accidents, taking Shandong Mining Area first 8 meters fully-mechanized mining face as the research object, the numerical simulation analysis showed that the peak value of abutment pressure in fully-mechanized mining face coal wall around 6 ~ 9 meters, the peak pressure in the coal lane to help the wall around 6 meters, based on the field observation and data analysis of the support pressure of mining face of mine pressure were studied. The results showed that with the mining height were broken up, help phenomenon aggravate, the first pressure step of the work mining face away from 40 to 44 meters, continuous pressure for 5 knives, periodic weighting distance was 7. 5 ~ 16. 8 meters and an average of 10. 77 meters, continuous pressure for 2 ~ 8 knives and an average of 4. 8 knives, roughly the present big-small irregular change trend, dynamic load coefficient was 1. 36 ~ 1. 74, the compressive strength was stronger, compared with 7 meters mine pressure behavior ob