滚筒设计参数与粉尘爆炸率关系的数学模型

综采工作面的粉尘主要是由采煤机截割煤炭而产生,螺旋滚筒作为采煤机的工作装置,直接与煤岩接触,参与落煤和装煤的过程,其结构参数、工作参数直接决定着机器工作时的产尘量大小,影响工作面的粉尘浓度。因此,笔者通过简化与假设,在粉尘检测数据的基础上,选取滚筒直径,螺旋头数,截线间距,每线齿数和切屑厚度为自变元,提出了工作面粉尘爆炸概率的确定方法,建立了滚筒设计参数与采煤工作面粉尘爆炸率之间关系的数学模型,为分析机械参数与安全之间的关系和影响、为合理地设计滚筒及其采煤机的参数、减小采煤工作面的粉尘、降低粉尘爆炸率、提高煤炭生产的安全提供理论依据。

Mathematic Model of Relation between Drum Design Parameters and Dust Explosion Rate

Dust on a mechanized coalface is mainly produced during a shearer cutting the coal. A spiral drum is a working unit of a shearer, which contacts directly with coal and rock, and takes on breaking and loading coal work. The amount of dust formed is directly determined by structural parameters and working parameters of the drum, and dust concentration on the coalface is influenced by these parameters. Therefore, taking diameter of drum, number of spiral, spacing of a cutting line, and numher of picks on each line and thickness of cutting slack as self-variable elements, the determination of dust explosion probability on a mechanized coalface is set forward by means of simplification and supposition. A mathematic model of relation between dust explosion rate and drum design parameters is set up on the basis of checked and measured data, which provides theoretical criteria for analyzing relation and influence of the machine parameters to safety on a coal face, reasonable design of drum and parameters of the machine, reducing dust on the face, lowering dust explosion rate, and improving safety in coal production.