山东煤炭科技
山東煤炭科技
산동매탄과기
Shandong Coal Science and Technology
2015年
11期
97-98,101,103
,共4页
卸压瓦斯抽采%穿层钻孔%瓦斯超限%安全生产
卸壓瓦斯抽採%穿層鑽孔%瓦斯超限%安全生產
사압와사추채%천층찬공%와사초한%안전생산
gas drainage in pressure releasing area%borehole passing through strata%gas overrun%safety production
针对小煤矿极薄煤层开采过程中工作面瓦斯超限频繁的问题，该文以四川白鹤煤矿为例，采用顶底板穿层钻孔技术进行了卸压瓦斯抽采试验，结果表明：顶板穿层钻孔抽采卸压瓦斯效果理想，瓦斯抽采率达到了33%；底板穿层钻孔抽采卸压瓦斯的单孔瓦斯流量较小，浓度较高。通过顶底板穿层钻孔对邻近层进行瓦斯抽采，工作面瓦斯超限问题得到了有效解决，保障了安全生产，为相似条件下的瓦斯抽采提供了依据。
針對小煤礦極薄煤層開採過程中工作麵瓦斯超限頻繁的問題，該文以四川白鶴煤礦為例，採用頂底闆穿層鑽孔技術進行瞭卸壓瓦斯抽採試驗，結果錶明：頂闆穿層鑽孔抽採卸壓瓦斯效果理想，瓦斯抽採率達到瞭33%；底闆穿層鑽孔抽採卸壓瓦斯的單孔瓦斯流量較小，濃度較高。通過頂底闆穿層鑽孔對鄰近層進行瓦斯抽採，工作麵瓦斯超限問題得到瞭有效解決，保障瞭安全生產，為相似條件下的瓦斯抽採提供瞭依據。
침대소매광겁박매층개채과정중공작면와사초한빈번적문제，해문이사천백학매광위례，채용정저판천층찬공기술진행료사압와사추채시험，결과표명：정판천층찬공추채사압와사효과이상，와사추채솔체도료33%；저판천층찬공추채사압와사적단공와사류량교소，농도교고。통과정저판천층찬공대린근층진행와사추채，공작면와사초한문제득도료유효해결，보장료안전생산，위상사조건하적와사추채제공료의거。
According to the problem of gas overrun frequently in the process of mining in small thin coal seam, this paper takes Baihe mine in Sichuan as an example, the technology of borehole passing through roof and lfoor is used for gas drainage in pressure releasing area, the results showed that the borehole passing through roof is ideal for pressure relief gas extraction, the gas extraction rate was 33%; the gas lfow in boreholes passing through bottom is smaller for gas extraction in pressure relief area, on the contrary ,the gas concentration is higher. Through boreholes passing through strata for gas extraction, the problem of gas overrun in the working face has been solved effectively,ensure the safety in production,and provide the basis for gas extraction under similar conditions.
