发明名称 |
Minimizing subsidence effects during production of coal in situ |
摘要 |
Coal is reduced to ash in place by gasification using in situ production techniques, resulting in significant void space underground, which in turn causes roof fall and subsidence. Overburden collapse is stabilized by backfilling with foaming mud cement that hardens into an expanded solid, which quenches and fills the production module and seals residual ash. Rubble volumes and subsidence cracks are sealed against water incursions and contaminated water excursions. Surface facilities above barrier pillars are protected from destructive forces of subsidence draw.
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申请公布号 |
US4463807(A) |
申请公布日期 |
1984.08.07 |
申请号 |
US19830479830 |
申请日期 |
1983.03.28 |
申请人 |
IN SITU TECHNOLOGY, INC. |
发明人 |
STODDARD, XERXES T.;VASEEN, VESPER A.;TERRY, RUEL C. |
分类号 |
E21B33/138;E21B43/247;E21F15/00;(IPC1-7):E21B33/00 |
主分类号 |
E21B33/138 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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