基于PFC2D对煤柱工作面综放工艺优化分析

以王庄煤矿43M1煤柱工作面为例,通过采用PFC2D颗粒元程序对煤柱工作面开采时顶煤放出率进行模拟分析,进而优化综放工艺参数.得出双轮顺序顶煤放出率为84.6%;单轮顺序顶煤放出率为82.8%;单轮间隔顶煤放出率为79.5%,故选用双轮顺序放顶煤.放煤步距为0.8 m时,顶煤放出率85.22%;放煤步距为1.6 m时,顶煤放出率81.31%;放煤步距为2.4 m时,顶煤放出率74.47%,故选用一刀一放的放煤方式.经井下现场数据记录分析后,综放工作面的开采工艺采用单向割煤端部斜切进刀的方式将更利于生产.

Optimization Analysis of Fully Mechanized Caving Technology on Coal Pillar Working Face Based on PFC 2D

Taking 43M1 coal pillar working face in Wangzhuang Coal Mine as an example,the PFC 2D particle element program was used to simulate the top-coal recovery rate in the mining so as to optimize the technical parameters of the fully mechanized caving.It was concluded the top coal recovery rate in double-round sequence to be 84.6%,in single-round sequential 82.8%,in single-round interval caving 79.5%,so the double-round sequential top coal caving was selected.When the caving interval was 0.8 m,the top coal recovery rate would be 85.22%;when the caving interval was 1.6 m,the top coal recovery rate would be 81.31%;when the caving interval was 2.4 m,the top coal recovery rate would be 74.47%,so one-knife-one-c aving method was selected.On the analysis of the underground field data,the fully mechanized top coal caving face could adopt the one-way coal cutting with oblique cutting,which would be more beneficial to the production.