以“梁”的理论为依据，确定房柱式采煤法的基本结构煤房和煤柱的参数及计算公式。
On the theory of "beam", the basic structure, parameters and formula for rooms & pillars have been educed.
煤、铁矿、钢、铝，对于这类主要用于房建基建的原材料需求正在放缓。
Demand for primary products used mainly in housing and infrastructure-coal, iron ore, steel and aluminium-is slowing.
本文探讨了影响煤柱稳定性的因素，提出了采用锚杆支护加固煤柱减小煤柱尺寸提高房柱式采煤回采率的技术途径。
The factors affecting coal pillar stability are discussed, and the technical way reducing coal pillar size and enhancing recovery ratio is put forward by means of rock bolting.
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