共查询到19条相似文献,搜索用时 171 毫秒
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通过河南平宝公司首山一矿己15-12010运输巷掘进工作面的瓦斯地质分析,提出了高压磨料射流割缝技术与钻孔瓦斯排放相结合的综合防突技术措施,提出从点到线、从线到面,继而构成立体的卸压理念,大大提高了突出危险掘进工作面的掘进速度. 相似文献
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以山西省潞安一缘煤业150112试验工作面运输巷的掘进为工程背景,基于GF-100型超高压水力割缝设备,分析了煤巷掘进工作面高压水力割缝强化瓦斯抽采的技术原理。将高压水力割缝工艺与高瓦斯矿井煤巷的安全、快速掘进有机结合,提高了掘进工作面煤体的渗透特性,增强了瓦斯抽采效果,形成了基于水力割缝的高瓦斯煤层掘进工作面强化增渗技术工艺体系,并在试验工作面煤巷掘进中进行了应用。结果表明:①将高压水力割缝工艺应用于高瓦斯矿井煤巷的掘进作业,解决了使用常规方法施工措施钻孔工程量大、抽采周期长的问题;②在采用水力割缝作业期间,瓦斯抽采量提高了2.36~2.4倍,平均日进尺提升了近2.5倍。 相似文献
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高压磨料射流割缝技术及其在防突工程中的应用 总被引:4,自引:2,他引:2
分析了煤层巷道煤与瓦斯突出机理,提出了整体卸压理念,开发了高压磨料射流割缝防突技术并且在煤层巷道掘进工作面进行了实际应用.应用结果表明:该技术可用于具有突出或冲击危险的煤层,可以使钻孔之间相互沟通,造出缝隙,使煤体得到充分卸压、煤体中的瓦斯得到排放和应力得到解除,为掘进工作提供较为安全的工作环境. 相似文献
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论文结合平煤集团四矿实际生产情况,在分析原来超前排放钻孔防突技术的基础上,介绍了高压磨料射流割缝技术在防突卸压方面的应用,并进行了高压磨料射流割缝技术防突设计,确定了射流割缝防突技术参数,为高破坏松软突出煤层的巷道掘进提供了另类有效的防突途径。 相似文献
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为了有效地消除煤层突出危险性,利用高压磨料射流钻割一体化技术,在Ⅱ8210工作面底板双岩巷实施对该工作面的消突试验,测定了割缝后瓦斯抽采速度和流量。实践证明,该技术可以有效地消除煤层的突出危险性,从而为矿井安全生产提供保障。 相似文献
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工业试验证实水力掏槽防突措施能有效地保证掘进中的施工安全,掏槽后快速消除突出危险,提高突出地段煤巷掘进速度。对水力掏槽措施中的高压水射流、地应力、瓦斯内力等参数进行了分析研究,研究了水力掏槽防突的机理。 相似文献
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通过理论研究和工业试验,确定了水力掏槽新掘进防突措施,并提出了适合焦作矿区的防突措施参数,系统评价了水力掏槽防突措施的有效性、适应性和安全性.研究结果表明:水力掏槽防突措施是高压水通过水枪产生高流量的稳定射流破碎前方煤体形成槽硐,槽硐周围煤体得到充分卸压,释放出大量瓦斯,煤体物理力学性质发生改变.当卸压槽具有足够面积时,在巷道周围形成卸压和排放瓦斯的煤带,解除突出危险性.2 000 m严重突出地区巷道掘进表明:正常掘进期间未发生一次突出,巷道安全掘进速度提高2倍以上. 相似文献
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以山西潞安集团一缘煤业的150112回风巷掘进工作面为试验地点,对水力造穴增透顺层条带预抽区域防突措施进行研究。试验采用前进式造穴工艺,在掘进工作面迎头打设5个长度为120m的造穴钻孔,实际造穴52个,造穴规格为长1m×Φ0.8m的圆柱体,造穴水压为16~18MPa,总出渣量150t。通过本次试验得出:造穴钻孔的标况日平均抽采纯量由未造穴时的62m提高到316m|掘进过程中巷道回风流瓦斯浓度由原来的0.7%降低到0.4%|造穴区域的软分层相比未造穴区域煤层含水量升高,煤质变硬,粉煤减少,掘进过程中产尘量减少,瓦斯动力次数减少,掘进效率大幅提高。但由于水力造穴过程会对煤层结构及顶、底板产生一定的破坏,所以在巷道掘进期间需加强顶板及巷道两帮的支护管理,且水力造穴技术不适用于造穴影响范围内巷道顶、底板有遇水后变软岩层的矿井。 相似文献
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为考察潘三矿13-1突出煤层水力冲孔技术措施的消突效果,基于13-1煤层的赋存条件,介绍了潘三矿-650 m东四运输大巷利用穿层钻孔进行水力冲孔试验的过程,研究了水力冲孔的冲出煤量、风流中瓦斯浓度、考察孔瓦斯流量、瓦斯抽采半径和冲孔前后瓦斯抽采流量变化等5个方面。结果表明:在单孔每米冲出煤量达到2.0~3.0 t时,13-1煤层瓦斯抽采半径达到4.5 m,考察孔瓦斯流量为冲孔前的10倍以上,瓦斯流量衰减系数仅为冲孔前的30%,在冲孔控制区域内煤体得到卸压,煤层瓦斯含量降低了近70%,释放了煤层的突出潜能,取得了明显的卸压增透效果。 相似文献
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Measured to control serious coal-gas outburst in coal seam were analyzed by theory and experimented in test site. A new technique
to distress the coal-bed and drain methane, called hydraulic slotting, was described in detail, and the mechanism of hydraulic
slotting was put forward and analyzed. The characteristic parameter of hydraulic slotting was given in Jiaozuo mining area
and the characteristic of validity, adaptability and security was evaluated. The results show that the stress surrounding
the strata and the gas in coal seam is released efficiently and thoroughly while new techniques are taken, as slotting at
heading face by high pressure large diameter jet. The resistance to coal and gas outbursts is increased dramatically once
the area of slotting is increased to a certain size. In the process of driving 2 000 m tunnel by hydraulic slotting excavation,
coal and gas outburst never occurre. The technique could be used to prevent and control potential coal-gas outburst in the
proceeding of tunnel driving, and the speed tunneling could be as high as more than 2 times.
Supported by National Nature Science Foundation of China(50534070); International Science and Technology Cooperation and Communion
Key Project of Ministry Science and Technology of China (2005DFA61030); Natural Science Foundation of Henan Province (200510460014);
Coal Mine Gas and Fire Prevention and Control Key Laboratory Foundation of Henan Province (HKLGF200708) 相似文献
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In order to rescue a trapped miner and clean out roadways quickly in a high gas mine shaft after a mining mishap, a special
portable cold-cutting equipment is needed. the main technology parameters were calculated according to the advanced cold-cutting
technology of high pressure abrasive water jet and the portable mixed abrasive water jet equipment (PAWE) was designed to
meet the needs of emergency rescue in high gas mine shafts. Tested the PAWE in a high gas environment, and the result shows
that the maximum cutting depth of solid iron pipe is 18 mm and the recoilforce of the sprayer is 28.9 N under the conditions
that actual cutting pressure is 29 MPa, starting target distance is 10 mm, cutting speed is 180 mm/min and concentration of
abrasive is 32%. The course of the experiment in the high gas environment was smooth and continuous, without any explosion.
The PAWE is easy to move and operate, but the nozzle which was worn badly in the sprayer should be changed every 8 minutes. 相似文献
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介绍了长钻孔控制松动爆破防治机采工作面煤与瓦斯突出技术在阳泉一矿的研究试验情况。研究结果表明:实施控制松动爆破后,降低了应力,排放了煤体瓦斯,达到了防突和加快工作面推进度的目的。 相似文献