State Key Laboratory Breeding Base for Mining Disaster Prevention and Control, Shandong University of Science
and Technology School of Mining and Safety Engineering, Shandong University of Science and Technology
Caozhuang Mine, Feicheng Mining Group Co.，Ltd.

为研究似膏体充填开采覆岩运动规律,采用自行研发的矿压传感器对曹庄煤矿81006似膏体充填工作面进行矿压观测,得到了81006工作面超前支承压力分布规律、充填体内垂直应力及已充填区域内顶底板移近量。结果表明:超前支承压力影响范围为10 m左右,煤壁前方应力场为单一的弹性应力分布;已充填区域内顶底板最大移近量为104 mm,充填体压缩率约为5.2%;充填体内应力计进入稳定状态后应力为15.06 MPa,与原岩应力13.75 MPa相近,充填体接顶效果较好,充填体可以支承上覆岩层的全部质量;工作面充填后,矿压显现较弱,覆岩较稳定,达到预期效果。

In order to study the overburden strata movement law of a paste- like backill coal mining face, a self- developed mine pressure sensor was applied to th e mine strata pressure observation of No.81006 paste- like backill coal mining face in Caozhuang Mine. A distribution law of advance support pressure in No. 81006 co al mining face was obtained, including vertical stress within the backfilled mass and the roof and floor convergence value within the backfilled area. The results showed that an influence scope of the advance support pressure was about 10 m and a stress filed in front of the coal wall was in single elastic stress distribution. The max con vergence value of the roof to floor within the backfilled area was about 104 mm and the compression ratio of the backfilled mass was 5. 2%. After the stress gauge in th e backfilled mass was in a stable state, the stress was 15. 06 MPa and was close to the in- situ rock stress of 13. 75 MPa. A roof connection effect of the backfilled mas S was good and the backfill mass could support full weight of the overburden strata. After coal mining face was backfilled, the mine strata pressure behavior was weak, the overburden strata was sable and expected effect was reached.

国家重点基础研究发展规划(973计划)资助项目(2012CB723104)；中国煤炭工业协会指导性计划资助项目(MTKJ2012-345)；