【摘要】：基于神東礦區(qū)厚松散層薄基巖淺埋深近距離煤層群的開采特點,分析了工作面低氧氣體的來源及涌出原因,給出了工作面低氧的防治對策。認為:神東礦區(qū)煤層處于N_2-CO_2帶,加之采空區(qū)遺煤低溫氧化產(chǎn)生大量低氧氣體,在通風負壓和大氣壓力的作用下,通過漏風通道由采空區(qū)向回風隅角涌出,造成工作面低氧。低氧的防治是多種技術手段的綜合應用,在開拓開采方面,盡量少留或不留聯(lián)巷,減少采空區(qū)遺煤,采空區(qū)達5個以上時,相鄰工作面留設足夠距離的隔離煤柱;在安全監(jiān)測方面,設置氧氣傳感器、警示標牌,建立低氧預警機制;在通風系統(tǒng)方面,根據(jù)實際條件采用"U+L"型、"Y"型或均壓通風系統(tǒng);在通風技術及管理方面,采取封堵漏風通道,對采空區(qū)進行泄壓等措施。
[Abstract]:Based on the mining characteristics of shallow buried deep and short distance coal seams of thick loose strata and thin bedrock in Shendong mining area, the source and causes of low oxygen gas in working face are analyzed, and the countermeasures of preventing and treating low oxygen in working face are given. It is considered that the coal seam in Shendong mining area is in N_2-CO_2 zone, in addition, a large amount of low oxygen gas is produced by low temperature oxidation of coal left in goaf. Under the action of negative pressure of ventilation and atmospheric pressure, the air leakage channel flows from goaf to corner of return air, resulting in low oxygen in working face. The prevention and cure of low oxygen is the comprehensive application of many kinds of technical means. In the aspect of exploiting and mining, as far as possible, few or no joint roadways will be left, and the remaining coal in goaf will be reduced. When the goaf reaches more than 5, the separated coal pillar with enough distance will be set up in the adjacent working face. In terms of safety monitoring, oxygen sensors, warning signs, and early warning mechanisms for low oxygen are set up; in ventilation systems, "U L", "Y" or equal-pressure ventilation systems are adopted according to actual conditions; and in terms of ventilation technology and management, Measures should be taken to block the air leakage passage and release pressure from the goaf.
【作者單位】： 中國神華集團神東煤炭公司;
【分類號】：TD724

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本文編號：2293485