Method for controlling path of coal mine underground directional drilling

The invention relates to a method for controlling the path of coal mine underground directional drilling. The method comprises following steps: step 1. determining a predetermined path; step 2. determining input and output, establishing a prediction model based on two output least squares support vector machine, and predicting next testing point path parameters by means of practical drilling path; step 3. comparing the path predicted by practical drilling path with the predetermine path, and offering the optimal tool face angle through the minimum offset, and controlling the following practical path drilling and performing correction to realize effective control on drilling path. Therefore, the provided method has easy operation, reliable results and engineering use value which can be a real time guidance for on-site drilling construction.