进入八十年代以来,我局综合机械化采煤上得较快,年平均综采面个数由1974年的1.79个发展到1981年的10.77个,综采面煤炭总产量由23.6万吨增加到523万吨。由于综采面的推进速度加快,煤炭产量增加,工作面的煤尘生成量和落煤瓦斯量也大幅度上升,综采工作面含尘量有的高达10050毫克/米~3,平均含尘量为1465毫克/米~3。远远超过 Since the 1980s, I Bureau of integrated mechanized coal mining faster, the average number of fully mechanized mining face from 1974 to 1.79 in 1981 to 10.77, total coal production increased from 236,000 tons to 5.23 million tons. Due to the accelerated progress of fully mechanized coal mining face, coal production increased, the amount of coal dust generated on the working face and the coal consumption dropped sharply. The dust content of fully mechanized coal mining face was as high as 10,050 mg / m ~ 3 with an average dust content The amount of 1465 mg / m ~ 3. Far more than the