With the rapid development of social economy in China, contradiction between wide distribution abandoned goaf and shortage land for engineering construction is becoming increasingly prominent. The effective utilization coal mining subsidence areas has become an measure to alleviate poverty promote green transformation cities. key scientific prevention control surface residual deformation, which...

In longwall top coal caving (LTCC), the resource recovery ratio of working face is directly determined by ratio. An investigation evolution drawing characteristics and revealing parameters necessary when providing guidance for parameter selection improving Based on in-situ measurements size distribution caved blocks in Wangjialing mine, a finite difference method (FDM)–discrete element (DEM) co...

Background: The most commonly used indicator for dental caries level is the DMF-T index. index assessing health status due to in permanent teeth. was first by Henry Klein et al. sum of D/decay (dental caries), M/missing (missing teeth), and F/filling (caved teeth). Physical cognitive changes elderly resulted assessment corresponding. Materials Methods: This an analytic observational study, usin...

Hulu Sungai Tengah (HST) Regency has a very large marshland in the South Kalimantan Province. Since 2019 HST is promoted to be model for Indonesian local foods and agricultural development program, known as SERASI Program. stands "Selamatkan Rawa dan Sejahterakan Petani" (or English "save bring prosper farmers") that aimed exploit which was not productive yet. The will convert non-productive ca...

Pressure relief for roadways retained by roof cutting is essentially caused stress transfer. In this paper, the transfer mechanism of 16011 tail entry with in Zhaogu No.1 coal mine studied from following two aspects: change surrounding rock structure and interaction between roadway supporting structures. It found numerical simulation that can significantly reduce magnitude stress, transferring ...

Underground longwall mining can seriously disturb the surrounding rock masses above panel. A surface cracking zone, continuous deformation fractured and caved zone be formed in overlying strata (termed “four zones”), which may further result spontaneous combustion of coal seams water inrush. It is essential to study predict development characteristics four zones induced by guarantee safety. The...

In order to investigate further the reported beneficial effect of deglycyrrhizinated liquorice in gastric ulcer, a trial with a double-blind, cross-over design was performed. The patients were treated during two consecutive periods of four weeks each with either liquorice extract during the first period and placebo during the second or placebo during the first period and liquorice during the se...