At present, China's construction industry, roof insulation, turn on the beam used in filling or expanded perlite, etc., ceramic, aerated concrete block, cinder and so on.
The stability of the underhand drift cemented filling body is analyzed by using stress arch theory and beam theory, and a simple judgment formula of the stability is obtained.
将压力拱理论与简支梁理论相结合分析了下向进路胶结充填体的稳定性，给出了充填体稳定性的简易判定公式；
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It is researched and discovered that filling plasma into microwave instrument may increase it's output power and interaction efficiency and improve transmission quantity of electronic beam.