gobs


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Synonyms for gobs

References in periodicals archive ?
The weight of waste rocks in the natural arch of the gobs of lower coal stratum acts directly on the coal stratum flooring.
c] is the average load of the flooring of the gobs of lower coal stratum.
For misaligned independent natural arch structure of close distance coal strata, the loading condition of the natural arch of the gobs of lower coal stratum is similar to the case of aligned independent structure.
Therefore, in the condition of identical excavating range of coal strata, the average load of coal pillars and flooring in the gobs of lower coal stratum can also be calculated by respectively Equations 9 and 10.
As the compressive ratio of waste rocks in the gobs is relatively large, the weight of overlying rocks in the gobs will be sustained by natural arch of both coal strata, while the weight of waste rocks of the two coal strata applies directly on the bottom as static load.
Similarly, according to vertical force equilibrium of natural arch in the gobs, the load of lower coal stratum flooring on the coal pillars in the gobs can be calculated as:
The loading of flooring of lower coal strata due to the static load of waste rocks of the gobs of the two coal strata can be calculated according to the principle of hydrostatic pressure as:
Similarly, the load of waste rocks in the gobs of lower coal stratum on the coal stratum flooring can be calculated as:
For Equations 13 and 14, the weight of natural arch springing of lower coal stratum and area of the gobs can be calculated similarly to Equation 11.