特厚煤层工作面顶煤冒放性评价及放煤工艺

Evaluation of Top Coal Caving in Extra-thick Coal Seam and Coal Drawing Technology

顶煤冒放性与放顶煤工艺设计密切相关,以塔山煤矿特厚煤层为工程背景,采用隶属度评价方法进行了顶煤冒放性评价。结果显示,一盘区8117工作面和二盘区8209工作面顶煤冒放性好,二盘区8234工作面和三盘区8303工作面顶煤冒放性一般。基于此,选择了工作面放煤工艺,并对8234工作面放煤效果进行了现场实测,结果显示顶煤放出率和工作面来压情况呈现正相关。

The top coal caving is closely related to the top coal caving process design.Taking the extra thick coal seam of Tashan Coal Mine as the engineering background,the membership evaluation method is used to evaluate the top coal caving.The results show that the top coal caving of the 8117 face in No.1 area and the 8209 face in No.2 area is good,while that of the 8234 face in No.2 area and the 8303 face in No.3 area is general.Based on this,the coal caving technology of working face is selected.The coal drawing effect of the 8234 working face is measured in the field,and the results show that there is a positive correlation between the top coal drawing rate and the coming pressure of the working face.