破碎采场通风天井预注浆加固基岩深孔爆破成井技术

由于矿岩破碎,采区通风天井掘砌施工安全性较差,反掘扩孔和反掘扩刷过程中均存在塌方等安全风险。以某铁矿复杂破碎采场为背景0,进行通风天井预注浆加固基岩深孔爆破成井技术研究与实践。采用“正掘导孔+反掘扩孔+反掘扩刷”技术进行采区通风天井施工,针对塌方段提出2种施工方案:钢圈加固和壁后浇筑充填支护工艺、钢筒预埋注浆管浇筑充填和注浆加固联合支护工艺,虽能达到预期处理效果,但施工工期长;在此基础上,提出破碎采场通风天井下行注浆加固基岩及大直径深孔凿岩分段爆破成井施工工艺,可有效避免井筒塌方风险,工期缩短50%。可为破碎采场盲竖井掘砌施工提供一条新思路。

反井钻机在喀矿3号风井地下人行通风天井的应用

天井施工是地下矿山井巷工程中必不可少的重要施工环节,施工难度也最大。与人工搭架法、吊罐法、爬罐法等施工工艺相比,反井钻机是一种机械化程度高、安全高效、无可比拟的大型反井施工设备。

利用采场顺路天井改造通风天井应用研究

针对多中段同步开采、作业点面多且分散、通风线路长等问题的矿井,提出了利用浅孔留矿法采场顺路天井改造通风天井的方法。通过实践表明,该通风天井能满足通风系统改造要求,施工方便、经济成本低且安全生产系数高,可有效改善井下通风系统,优化井下作业环境,解决人工掘进天井安全系数及效率低、机械掘进经济成本高的问题。

接龙铁矿通风系统优化

为了提高接龙铁矿井下通风质量,改善各采掘工作面的通风效果,基于矿井通风网络探讨优化改进措施,在适当的位置增设调节风门、挡板等通风设施和布置措施通风天井。优化前后实际检测结果对比表明:在适当的位置增设相关通风设施,能够有效提高采掘工作面的风速和风量,从而满足井下生产人员的用风需要,提高井下安全生产水平和采掘生产效率。

Technique of coal mining and gas extraction without coal pillar in multi-seam with low permeability

Aimed at the low mining efficiency in deep multi-seams because of high crustalstress,high gas content,low permeability,the compound 'three soft' roof and the trouble-somesafety situation encountered in deep level coal exploitation,proposed a new idea ofgob-side retaining without a coal-pillar and Y-style ventilation in the first-mined key pressure-relieved coal seam and a new method of coal mining and gas extraction.The followingwere discovered:the dynamic evolution law of the crannies in the roof is influenced bymining,the formative rule of 'the vertical cranny-abundant area' along the gob-side,thedistribution of air pressure field in the gob,and the flowing rule of pressure-relieved gas ina Y-style ventilation system.The study also established a theoretic basis for a new miningmethod of coal mining and gas extraction which is used to extract the pressure-relievedgas by roadway retaining boreholes instead of roadway boreholes.Studied and resolvedmany difficult key problems,such as,fast roadway retaining at the gob-side without a coalpillar,Y-style ventilation and extraction of pressure-relieved gas by roadway retainingboreholes,and so on.The study innovated and integrated a whole set of technical systemsfor coal and pressure relief gas extraction.The method of the pressure-relieved gasextraction by roadway retaining had been successfully applied in 6 typical working faces inthe Huainan and Huaibei mining areas.The research can provide a scientific and reliabletechnical support and a demonstration for coal mining and gas extraction in gaseous deepmulti-seams with low permeability.

可持续发展实验住宅——日本积水住宅公司实验住宅案例介绍

可持续发展实验住宅是在东京城市住宅区中建设的一栋有研究性质的实验住宅,其宗旨是要通过充分利用风、阳光等自然的力量来实现不依赖于机械设备的节能而且舒适的生活。借鉴传统日本住宅的优点,创造重视居住者心理感受的生活环境,并通过居住实验证实了该住宅可以让居住者感受到比客观测定的物理环境值更具舒适性的居住品质。